ICS Part 1 Physics English Medium Chapter 9 Online Short Questions Test with Answers

Online Short Questions For Chapter 9 "ICS Part 1 Physics Chapter 9 Short Questions Test "

Try The Short Questions For ICS Part 1 Physics Chapter 9 Short Questions Test

Total Questions10
Available Sets3

Start Test Download PDF

Physics - ICS Part 1 Physics Chapter 9 Short Questions Test

Question # 1

How will you increase the fringe width in young's double slit experiment?

Ans 1:

Question # 2

Write two steps of Huygen's principle.

Ans 1:
1. Each point of a wave front may be considered as a source of secondary wavelets.
2. The new position of the wave front after a certain interval of time can be found by constructing a surface that touches all the secondary wavelets.

Question # 3

What are conditions for detectable interference of light?

Ans 1: For detectable interference,light beam should be
- Monochromatic
- Coherent

Question # 4

How would you distinguish between un-polarizedand plane polarized lights?

Ans 1: Un-Polarized lights: A beam of ordinary light consists of electric and magnetic vibrations which are perpendicular to the direction of propagation. It is called un-polarized light.

Plane Polarized lights: The beam of light in which all vibrations are confined to one plane of vibration is called plane polarized light.

Question # 5

What are Newton's rings?

Ans 1: When a plano-convex lens of long focal length is placed in contact with a plane glass plate, a thin air film is enclosed between them to form circular dark and bright fringes known as Newton's rings.

Question # 6

What is diffraction of light?

Ans 1: The slight bending of light as it passes around the edge of an object is called diffraction of light.

Question # 7

Define wave front and spherical wave front.

Ans 1: Wave Front: Such a surface on which all the points have same phase of vibration is known as wavefront.

Spherical wave fronts: If a point source is sending out waves in three dimensions, the wave fronts are spheres centered on the source. Such wave fronts are called a spherical wave fronts.

Question # 8

What do you mean by coherent source ? Explain a common method for producing two coherent sources.

Ans 1: The monochromatic sources of light which emit waves, having a constant phase difference are called coherent sources.
A common method of producing two coherent light beams is to use a monochromatic source to illuminate a screen containing two small holes, usually in the shape of slits. The light emerging from the two slits is coherent because a single source produces the original beam and two slits serve only too split it into two parts.

Question # 9

What condition must be met by interfering beams to observe the phenomena of interference?

Ans 1: The following conditions must be met, in order to observe the phenomenon.
1. The interfering beams must be monochromatic, that is, of a single wavelength.
2. The interfering beams of light must be coherent.

Question # 10

Define polarization of light.

Ans 1: The phenomenon in which the vibration of waves can be oriented to any one direction (plane), That may be vertical, horizontal or any other direction is called polarization of light.

Submit

Prepare Complete Set Wise Questions For Chapter 9 "ICS Part 1 Physics Chapter 9 Short Questions Test "

Set 1

10 Questions
Start
Set 2

10 Questions
Start
Set 3

10 Questions
Start

ICS Part 1 Physics Chapter 9 Short Questions Test - Set 1

Question # 1

How will you increase the fringe width in young's double slit experiment?

Ans 1:

Question # 2

Write two steps of Huygen's principle.

Ans 1:
1. Each point of a wave front may be considered as a source of secondary wavelets.
2. The new position of the wave front after a certain interval of time can be found by constructing a surface that touches all the secondary wavelets.

Question # 3

What are conditions for detectable interference of light?

Ans 1: For detectable interference,light beam should be
- Monochromatic
- Coherent

Question # 4

How would you distinguish between un-polarizedand plane polarized lights?

Ans 1: Un-Polarized lights: A beam of ordinary light consists of electric and magnetic vibrations which are perpendicular to the direction of propagation. It is called un-polarized light.

Plane Polarized lights: The beam of light in which all vibrations are confined to one plane of vibration is called plane polarized light.

Question # 5

What are Newton's rings?

Ans 1: When a plano-convex lens of long focal length is placed in contact with a plane glass plate, a thin air film is enclosed between them to form circular dark and bright fringes known as Newton's rings.

Question # 6

What is diffraction of light?

Ans 1: The slight bending of light as it passes around the edge of an object is called diffraction of light.

Question # 7

Define wave front and spherical wave front.

Ans 1: Wave Front: Such a surface on which all the points have same phase of vibration is known as wavefront.

Spherical wave fronts: If a point source is sending out waves in three dimensions, the wave fronts are spheres centered on the source. Such wave fronts are called a spherical wave fronts.

Question # 8

What do you mean by coherent source ? Explain a common method for producing two coherent sources.

Ans 1: The monochromatic sources of light which emit waves, having a constant phase difference are called coherent sources.
A common method of producing two coherent light beams is to use a monochromatic source to illuminate a screen containing two small holes, usually in the shape of slits. The light emerging from the two slits is coherent because a single source produces the original beam and two slits serve only too split it into two parts.

Question # 9

What condition must be met by interfering beams to observe the phenomena of interference?

Ans 1: The following conditions must be met, in order to observe the phenomenon.
1. The interfering beams must be monochromatic, that is, of a single wavelength.
2. The interfering beams of light must be coherent.

Question # 10

Define polarization of light.

Ans 1: The phenomenon in which the vibration of waves can be oriented to any one direction (plane), That may be vertical, horizontal or any other direction is called polarization of light.

Submit

ICS Part 1 Physics Chapter 9 Short Questions Test - Set 2

Question # 1

Under what conditions two or more sources of light behave as coherent sources?

Ans 1: Toe or more sources of light behave as coherent sources if
1. They emit monochromatic wave.
2. They are phase coherent.

Question # 2

Write two steps of Huygen's principle.

Ans 1:
1. Each point of a wave front may be considered as a source of secondary wavelets.
2. The new position of the wave front after a certain interval of time can be found by constructing a surface that touches all the secondary wavelets.

Question # 3

How will you increase the fringe width in young's double slit experiment?

Ans 1:

Question # 4

Give the list of two substance which shows optical rotation when they are in solution.

Ans 1: Sugar and tartaric acid show optical rotation when they are in solution.

Question # 5

Explain whether the Young's experiment is an experiment for studying interference or diffraction effect of light.

Ans 1: Mainly, Young's experiment was performed to study the interference of light.However, it also involves diffraction.So diffraction can also be studied by this experiment because when light passes through the slit, it bends towards the corner.

Question # 6

What do you mean by the term wavefront and ray of light?

Ans 1: Such a surface on which all the points have same phase of vibration is known as wavefront.
A line normal to wavefront including the direction of motion is called a ray of light.

Question # 7

Define polarization of light.

Ans 1: The phenomenon in which the vibration of waves can be oriented to any one direction (plane), That may be vertical, horizontal or any other direction is called polarization of light.

Question # 8

How can the distance between interference fringes affect by the separation between the slits of young's experiment? Can fringes disappear?

Ans 1:

Question # 9

Write the names of any four processes to obtain plane polarized beam of light from un-polarized light.

Ans 1: This can be achieved by four processes such as
1. Selective absorption
2. Refraction throughout crystals
3. Reflection from different surfaces
4. Scattering by small particles.

Question # 10

Can visible light produce interference fringes? Explain.

Ans 1: Yes visible light or what light can produce interference fringes. But each color will produce its own interference fringe pattern. Theses patterns overlap to give rise to a resultant diffused coloured interference pattern.

Submit

ICS Part 1 Physics Chapter 9 Short Questions Test - Set 3

Question # 1

How will you increase the fringe width in young's double slit experiment?

Ans 1:

Question # 2

Why diffraction grating cannot be used for X-Rays diffraction?

Ans 1: In order to observe the effects of diffraction, the grating spacing must be of the order of wavelength of the incident light.
X-rays are of much shorter wavelength of the order of 10^-10 M
The regular array of atoms in a crystal forms a natural diffraction grating with spacing =10^-10 M.Which is not available in other diffraction grating.

Question # 3

Can visible light produce interference fringes? Explain.

Ans 1: Yes visible light or what light can produce interference fringes. But each color will produce its own interference fringe pattern. Theses patterns overlap to give rise to a resultant diffused coloured interference pattern.

Question # 4

In Young's experiment, one of the slits is covered with blue filter and other red filter, what would be the pattern of light intensity on the screen?

Ans 1: No interference pattern will be observed because blu and red lights are of different wavelengths. So the source of light will not be coherent

Question # 5

What do you mean by coherent source ? Explain a common method for producing two coherent sources.

Ans 1: The monochromatic sources of light which emit waves, having a constant phase difference are called coherent sources.
A common method of producing two coherent light beams is to use a monochromatic source to illuminate a screen containing two small holes, usually in the shape of slits. The light emerging from the two slits is coherent because a single source produces the original beam and two slits serve only too split it into two parts.

Question # 6

Can you obtain plane polarized light from un-polarized light? If your answer is yes, write the name of two processes by which plane polarized light is obtained.

Ans 1: Yes , we can obtain plane polarized light from un-polarized light.
This can be achieved by processes such as
- Selective absorption
- Reflection from different surfaces

Question # 7

Under what conditions two or more sources of light behave as coherent sources?

Ans 1: Toe or more sources of light behave as coherent sources if
1. They emit monochromatic wave.
2. They are phase coherent.

Question # 8

Center of Newton ring is dark. Why? Although thickness of air film is zero.

Ans 1:

Question # 9

Define optical rotation. Give its practical use.

Ans 1: When a plane polarized light is passed through certain crystals, they rotate the plane of polarization. It is called optical rotation.
Organic solutions such as sugar, tartaric acid etc., show optical rotation which is used to determine their concentration in the solutions.

Question # 10

In Newton's rings, Why are the fringes circular?

Ans 1: The thickness of the air film between plano-convex lens and plane glass plate is almost zero at the point of contact "o" and gradually increases as we proceed towards the periphery of the lens. Thus, points where the thickness of air film is constant will lie on a circle with "o" as centre. That is why circular fringes are produced.

Submit

Physics

9th Chapter

ICS Part 1 Physics Short Questions Test

Here you can prepare ICS Part 1 Physics English Medium Chapter 9. Click the button for 100% free full practice test.

Start Chapter 9 Test

Chapter 1

Chapter 2

Chapter 3

Chapter 4

Chapter 5

Chapter 6

Chapter 7

Chapter 8

Chapter 9

Chapter 10

Chapter 11

Short Questions
ICS Part 1

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

ICS Part 1 Physics English Medium Chapter 9 Online Short Questions Test with Answers

Online Short Questions For Chapter 9 "ICS Part 1 Physics Chapter 9 Short Questions Test "

Physics - ICS Part 1 Physics Chapter 9 Short Questions Test

How will you increase the fringe width in young's double slit experiment?

Write two steps of Huygen's principle.

What are conditions for detectable interference of light?

How would you distinguish between un-polarizedand plane polarized lights?

What are Newton's rings?

What is diffraction of light?

Define wave front and spherical wave front.

What do you mean by coherent source ? Explain a common method for producing two coherent sources.

What condition must be met by interfering beams to observe the phenomena of interference?

Define polarization of light.

Prepare Complete Set Wise Questions For Chapter 9 "ICS Part 1 Physics Chapter 9 Short Questions Test "

Set 1

Set 2

Set 3

ICS Part 1 Physics Chapter 9 Short Questions Test - Set 1

How will you increase the fringe width in young's double slit experiment?

Write two steps of Huygen's principle.

What are conditions for detectable interference of light?

How would you distinguish between un-polarizedand plane polarized lights?

What are Newton's rings?

What is diffraction of light?

Define wave front and spherical wave front.

What do you mean by coherent source ? Explain a common method for producing two coherent sources.

What condition must be met by interfering beams to observe the phenomena of interference?

Define polarization of light.

ICS Part 1 Physics Chapter 9 Short Questions Test - Set 2

Under what conditions two or more sources of light behave as coherent sources?

Write two steps of Huygen's principle.

How will you increase the fringe width in young's double slit experiment?

Give the list of two substance which shows optical rotation when they are in solution.

Explain whether the Young's experiment is an experiment for studying interference or diffraction effect of light.

What do you mean by the term wavefront and ray of light?

Define polarization of light.

How can the distance between interference fringes affect by the separation between the slits of young's experiment? Can fringes disappear?

Write the names of any four processes to obtain plane polarized beam of light from un-polarized light.

Can visible light produce interference fringes? Explain.

ICS Part 1 Physics Chapter 9 Short Questions Test - Set 3

How will you increase the fringe width in young's double slit experiment?

Why diffraction grating cannot be used for X-Rays diffraction?

Can visible light produce interference fringes? Explain.

In Young's experiment, one of the slits is covered with blue filter and other red filter, what would be the pattern of light intensity on the screen?

What do you mean by coherent source ? Explain a common method for producing two coherent sources.

Can you obtain plane polarized light from un-polarized light? If your answer is yes, write the name of two processes by which plane polarized light is obtained.

Under what conditions two or more sources of light behave as coherent sources?

Center of Newton ring is dark. Why? Although thickness of air film is zero.

Define optical rotation. Give its practical use.

In Newton's rings, Why are the fringes circular?

ICS Part 1 Physics Short Questions Test

Is this page helpful?