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 "

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Physics - ICS Part 1 Physics Chapter 9 Short Questions Test

Question # 1

How would you manage to get more orders of spectra using a diffraction grating?

Ans 1:

Question # 2

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 # 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

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 # 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

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 # 9

What is polarization of light?

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

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.

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

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

Question # 1

How would you manage to get more orders of spectra using a diffraction grating?

Ans 1:

Question # 2

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 # 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

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 # 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

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 # 9

What is polarization of light?

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

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

How would you manage to get more orders of spectra using a diffraction grating?

Ans 1:

Question # 2

Why the polaroid sun glasses are better than ordinary sun glasses?

Ans 1: Polaroid sun glasses are better than ordinary sun glasses because they reduce the glare of light entering into the eye as a result of polarization.

Question # 3

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

Ans 1:

Question # 4

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.

Question # 5

What is difference between interference and diffraction fringes?

Ans 1: Interference Fringes: The superposition of two waves having same frequency and travelling in same direction results in bright and dark fringes is called interference fringes.

Diffraction Fringes: The fringes formed due to the bending of light around edges and corners are called diffraction fringes.

Question # 6

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 # 7

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 # 8

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 # 9

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 # 10

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.

Submit

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

Question # 1

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 # 2

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 # 3

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 # 4

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 # 5

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

Ans 1:

Question # 6

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 # 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

What is the usual way to obtain plane wavefront from a point source?

Ans 1: A usual way to obtain a plane wavefront is to place a point source of light at the focus of a convex lens. The rays coming out of the lens will constitute plane waves.

Question # 9

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

Ans 1:

Question # 10

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.

Submit

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ICS Part 1 Physics Short Questions Test

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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 would you manage to get more orders of spectra using a diffraction grating?

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.

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?

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

What is diffraction of light?

Define wave front and spherical wave front.

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.

What is polarization of light?

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 would you manage to get more orders of spectra using a diffraction grating?

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.

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?

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

What is diffraction of light?

Define wave front and spherical wave front.

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.

What is polarization of light?

Define polarization of light.

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

How would you manage to get more orders of spectra using a diffraction grating?

Why the polaroid sun glasses are better than ordinary sun glasses?

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

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

What is difference between interference and diffraction fringes?

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

Define optical rotation. Give its practical use.

Can visible light produce interference fringes? Explain.

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

Define wave front and spherical wave front.

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

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

What are Newton's rings?

Define optical rotation. Give its practical use.

Define wave front and spherical wave front.

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

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

Define polarization of light.

What is the usual way to obtain plane wavefront from a point source?

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

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

ICS Part 1 Physics Short Questions Test

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