Question # 1

Application of wave like nature of particle is

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Photodiode

Optical microscope

Electron microscope

Compound microscope

When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be.

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Photoelectric effect

Compton effect

Pair production

Annihilation of matter

Eintein's Photoelectric equation is E_k= hf -∅ in this equation E₁, refers to:

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K.E of al the emited electrons

Mean K.E of emited electrons

Maximum K.E of emited electrons

Minimum K.E of emited electrons

A block body is an ideal:

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Absorber

Radiator

Both a & b

None of above

We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to:

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Uncertainity Priciple

De-broglie Theory

Einstin Theory

Photo electric effect

A perfect absorber must also be perfect

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Cavity

Sources of radiation

Radiator

None of these

Who explained the photo electric effect.

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Max Plank

Einstein

Henry

Rutherford

Anti particle of electron is

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Proton

Photon

Neutron

Positron

The photon with energy greater than 1.02 MeV can interact with matter as.

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Photoelectric effect

Compton effect

Pair production

annihilation of matter

In Compton effect the photon behaves as a.

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Wave

Particle

Nucleon

Both a and b

Unit of Stephen's constant is

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W m K^-2

W m^-2 K^-4

W m K^-4

None

Minimum energy needed to escape an electron ofrm metal surface is called:

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Threshold energy

Threshold frequency

Work function

Work ability

The minimum frequency needed to emit an electron form metal surface is called:

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Work function

Threshold frequency

Quanta frequency

All of above

Einstein photoelectric equation is

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None of these

The energy of photon is givne by

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mv2/2

hf

Va e

mac¹

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

Compton effect proves.

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Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

The maximum kinetic energy of emitted photo electrons depends upon.

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The intensity of incident light

Frequency of the incident light

Metal surface

Both frequency of incident light and metal surface.

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Physics Fsc Part 2 Chapter 8 Online Test MCQs With Answers

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