ICS Part 2 Physics Chapter 20 Short Questions Preparation

Question # 1

Briefly describe continuous x-rays.

Ans 1: Continuous X-rays is due to an effect known as Bremsstrahlung effect when fast moving electron bombarded at the target,they are suddenly slowed down on impact with the target,And due to deceleration their kinetic energy is converted into X-rays photons.

Question # 2

What is CAT scanner?

Ans 1: A vastly improved x-rays technique is computerized axial tomography: the corresponding instrument is called CAT scanner.In CAT scanning a number of different orientations.Computer is attached to construct picture,Density difference of the order of one percent can be detected,Tumors and other anomalies much too small to be seen with older techniques can be detected.

Question # 3

How can spectrum of hydrogen contain so many lines,whereas hydrogen atom contain one electron?

Ans 1: The single electron in hydrogen atom occupies ground state but it can be excited to several states by absorbing energy.During de-excitation ,it can emit several lines of different wavelength.

Question # 4

How does a K_ax-rays differ K_bX-rays?

Ans 1: When an electron from L -shell jumps to occupy the hole in K- shell K_ax-rays is emitted .
And
When an electron from M -shells jumps to occupy the hole in K-Shell K_bX-rays is emited.

Question # 5

Can electron reside inside the nucleus?

Ans 1: No,electron cannot reside inside the nucleus .If electron resides inside nucleus then uncertainty in position.

Question # 6

What are the advantages of laser over ordinary light?

Ans 1: Laser light has many advantages over ordinary light such as laser light is
1. Coherent
2. Intense
3. Monochromatic
4. Unidirectional

Question # 7

Write two properties of x-rays.

Ans 1:
1. They cause ionization.
2. They have very short wavelength.

Question # 8

Distinguished between stimulated emission and spontaneous emission.

Ans 1: Stimulated emission: If a atom is excited for a longer lifetime of about 10^-3sec than an incident photon of energy equal to the difference of two energy levels induces the atom to decay by emitting a photon that travel in the direction of incident photon.This process is called stimulated or induced emission.
Ans 2: Spontaneous Emission: As excited is highly unstable with life time of
10^-8sec,so electron will de excite itself with emission of a photon in any arbitrarydirection is called spontaneous emission.

Question # 9

What do you mean by inner shell transition?

Ans 1: A transition in which an electron from higher orbit,emits energy and accommodate a hole in the lower orbit.Such a transition is called inner shell transition.The photons emitted in such transition are called characteristic x-rays.

Question # 10

Define continuous spectrum.

Ans 1: The radiation emitted by continuous media such as ''Black Body" forms a continuous spectrum,In continuousspectrum wavelengths of radiations can not be observed in discrete lines.

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ICS Part 2 Physics Chapter 20 Short Questions Preparation

12th Class PhysicsShort Questions Preparation

12th Class Physics Chapter Wise Preparation

Online Short Questions For Chapter 9 "ICS Part 2 Physics Chapter 20 Short Questions Preparation "

Physics - ICS Part 2 Physics Chapter 20 Short Questions Preparation

Briefly describe continuous x-rays.

What is CAT scanner?

How can spectrum of hydrogen contain so many lines,whereas hydrogen atom contain one electron?

How does a Kax-rays differ KbX-rays?

Can electron reside inside the nucleus?

What are the advantages of laser over ordinary light?

Write two properties of x-rays.

Distinguished between stimulated emission and spontaneous emission.

What do you mean by inner shell transition?

Define continuous spectrum.

Prepare Complete Set Wise Questions For Chapter 9 "ICS Part 2 Physics Chapter 20 Short Questions Preparation "

Set 1

Set 2

Set 3

ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 1

Briefly describe continuous x-rays.

What is CAT scanner?

How can spectrum of hydrogen contain so many lines,whereas hydrogen atom contain one electron?

How does a Kax-rays differ KbX-rays?

Can electron reside inside the nucleus?

What are the advantages of laser over ordinary light?

Write two properties of x-rays.

Distinguished between stimulated emission and spontaneous emission.

What do you mean by inner shell transition?

Define continuous spectrum.

ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 2

Write down use of laser in industry.

Write two properties of x-rays.

Define population inversion and metastable stable.

List of color of line spectra of an excited hydrogen atom.

What do you mean by inner shell transition?

How does a Kax-rays differ KbX-rays?

What is meant by lasing action?

Give two uses of laser in medicine and industry.

Distinguished between stimulated emission and spontaneous emission.

What is fluorescence?

ICS Part 2 Physics Chapter 20 Short Questions Preparation - Set 3

Define population inversion and metastable stable.

Define continuous spectrum.

Distinguished between stimulated emission and spontaneous emission.

what is Spectroscopy?

How can spectrum of hydrogen contain so many lines,whereas hydrogen atom contain one electron?

Write two properties of x-rays.

Write down use of laser in industry.

Define characteristics of X-rays and continuous x-rays.

Can electron reside inside the nucleus?

Write use of x-rays.

ICS Part 2 Physics Chapter 20 Short Questions Preparation

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12th Class Physics
Short Questions Preparation

How does a K_ax-rays differ K_bX-rays?

How does a K_ax-rays differ K_bX-rays?

How does a K_ax-rays differ K_bX-rays?