ICS Part 2 Physics Chapter 19 Short Questions Preparation

Question # 1

Distinguished between photoelectric effect and Compton effect.

Ans 1: The emission of electron from a metal surface when exposed to suitable frequency light is called photoelectric effect and when x rays are scattered by loosely bound electrons from graphite target the phenomena of change in wavelength is known as compton effect.

Question # 2

When light shine on surface,is momentum transferred to metal surface?

Ans 1: Yes when light shine on surface,momentum is transferred to metal surface and also the energy.So metal is heated up.

Question # 3

Define Compton effect.Write formula of Compton shift for scattering angle.

Ans 1: When X-rays are scattered by loosely bound electrons from a graphite target,the phenomena of change in wavelength is known as Compton Effect.Compton shift for scattering angle is given
$\lambda '-\lambda ={\frac {h}{m_{e}c}}(1-\cos {\theta }),$

Question # 4

State uncertainty principle.

Ans 1: The product of uncertainty in the measurement of momentum and uncertainty in the measurement of position of an electron is approximately equal to Planck's constant.
The product of uncertainty in the measurement of energy and uncertainty in the measurement of time of an electron is approximately equal to Planck's constant.

Question # 5

Photoelectric effect give the evidence of the particle nature of light,Explain it how?

Ans 1: If light were simple a wave like phenomena ,then increasing the intensity and thereby increasing the total energy failing on the surface would be expected to eventually provide enough energy to release electron no matter what the frequency .Furthermore in the classical picture one would expect the maximum energy of the emitted electrons to depend on the intensity of light--but it does not.So this is evidence that light behaves as if it were a particle.

Question # 6

Can an object move with the speed of light?

Ans 1: As an object approaches the speed of light,its masses rises abruptly.If an object tries to travel 186,000 miles per seconds,its mass become infinite and so does the energy required to move it, For this reasons ,no normal object can be travel as fast as or faster than the speed of light.

Question # 7

A satellite is orbiting around earth.Is its frame of reference inertial or non-inertial ?Justify your answer.

Ans 1: The motion of the satellite is synchronized with the earth so it is in the same frame of reference in which earth lies.Hence the frame of reference will be inertial.

Question # 8

What do you know by annihilation of matter?

Ans 1: When a positron comes close to an electron,they annihilate and produce two photons in the gamma rays range.It is called annihilation of matter.

Question # 9

If you are moving in a spaceship at very high speed relative to the earth.Would you notice difference(a)In your pulse rate(b)In the pulse rate of people on the earth?

Ans 1:
1. The pulse rate of the person inside the spaceship moving with large velociety will decrease.
2. The pulse rate of the people on the earth with respect to the person inside the spaceship with large velocity will increase.

Question # 10

Differentiate between inertial and non-inertial frame of reference.

Ans 1: A coordinate system in which the law of inertia is valid is called inertial frame of reference.It is non-accelerated frame of reference.
Ans 2: A coordinate system in which the law of inertia is not valid is called non-inertial frame of reference.It is accelerated frame of reference.

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 2 Physics Chapter 19 Short Questions Preparation

12th Class PhysicsShort Questions Preparation

12th Class Physics Chapter Wise Preparation

Online Short Questions For Chapter 8 "ICS Part 2 Physics Chapter 19 Short Questions Preparation "

Physics - ICS Part 2 Physics Chapter 19 Short Questions Preparation

Distinguished between photoelectric effect and Compton effect.

When light shine on surface,is momentum transferred to metal surface?

Define Compton effect.Write formula of Compton shift for scattering angle.

State uncertainty principle.

Photoelectric effect give the evidence of the particle nature of light,Explain it how?

Can an object move with the speed of light?

A satellite is orbiting around earth.Is its frame of reference inertial or non-inertial ?Justify your answer.

What do you know by annihilation of matter?

If you are moving in a spaceship at very high speed relative to the earth.Would you notice difference(a)In your pulse rate(b)In the pulse rate of people on the earth?

Differentiate between inertial and non-inertial frame of reference.

Prepare Complete Set Wise Questions For Chapter 8 "ICS Part 2 Physics Chapter 19 Short Questions Preparation "

Set 1

Set 2

Set 3

ICS Part 2 Physics Chapter 19 Short Questions Preparation - Set 1

Distinguished between photoelectric effect and Compton effect.

When light shine on surface,is momentum transferred to metal surface?

Define Compton effect.Write formula of Compton shift for scattering angle.

State uncertainty principle.

Photoelectric effect give the evidence of the particle nature of light,Explain it how?

Can an object move with the speed of light?

A satellite is orbiting around earth.Is its frame of reference inertial or non-inertial ?Justify your answer.

What do you know by annihilation of matter?

If you are moving in a spaceship at very high speed relative to the earth.Would you notice difference(a)In your pulse rate(b)In the pulse rate of people on the earth?

Differentiate between inertial and non-inertial frame of reference.

ICS Part 2 Physics Chapter 19 Short Questions Preparation - Set 2

Define Compton effect.Write formula of Compton shift for scattering angle.

Differentiate between special theory of relativity and general theory of relativity.

Photoelectric effect give the evidence of the particle nature of light,Explain it how?

What are advantages of NAVSTAR navigation system?

Why can red light be used in a photographic dark room when developing films,but a blue or white light can not?

Give two postulate of special theory of relativity.

We do not notice the de-Broglie wavelength for a pitched cricket ball.Explain why?

λ =h/mv

Can a pair production take place in vacuum?Explain

Is it possible to create a single electron from energy?Explain

The rest mass of photon is zero.Is its momentum also zero?

ICS Part 2 Physics Chapter 19 Short Questions Preparation - Set 3

As a solid is heated and begins to glow ,why does it first of its absolute.

Write at least two justification for light to behave as wave and as a particle.

Why don't we observe a Compton Effect with visible light?

Photoelectric effect give the evidence of the particle nature of light,Explain it how?

If you are moving in a spaceship at very high speed relative to the earth.Would you notice difference(a)In your pulse rate(b)In the pulse rate of people on the earth?

Why can red light be used in a photographic dark room when developing films,but a blue or white light can not?

Will higher frequency of light ejects greater number of electrons than low frequency of light?

Is it possible to create a single electron from energy?

State uncertainty principle.

Define Compton effect.Write formula of Compton shift for scattering angle.

ICS Part 2 Physics Chapter 19 Short Questions Preparation

Is this page helpful?

Share your comments & questions here

12th Class Physics
Short Questions Preparation