Question # 1

De-Broglie received the Nobel prize in

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1929

1937

1928

1924

In Compton effect, it was considered that X-rays consist of:

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Electrons

Positrons

Photons

All of these

The energy of photon of wavelength 1240 nm is:

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0.5 eV

1.0 eV

1.5 eV

2.0 eV

The dimensions of Planck’s constant “h” are same as that of:

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Momentum

Angular momentum

Work

Torque

Photo cells is a device which convert light into:

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Wave nature

Particle nature

Particle wave nature

Dual nature

Interference and diffraction of light confirms its:

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Particle nature

Dual nature

Wave nature

Electromagnetic nature

Interference and diffraction confirm:

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Particle nature

Wave nature

Dual nature

None of these

Photoelectric effect and Compton effect prove the:

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Wave nature of light

Particle nature of light

Dual nature of light

G.P Thomson revealed:

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Particle nature of electron

Dual nature of electron

Wave nature of electron

Electromagnetic nature of electron

Diffraction pattern has also been observed for:

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Proton

Neutron

Hydrogen atom

All of them

The maximum kinetic energy of emitted photoelectrons depends upon:

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The intensity of incident light

Frequency of incident light

Metal surface

Both frequency of incident light and metal surface

A human eye can detect the electromagnetic radiations of the type:

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Infrared radiations

For- infrared radiations

X-rays radiations

Red radiations

The photoelectric effect was explained by:

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Einstein

Davison

Hertz

Planck

In photoelectric effect, if we increase the frequency of the incident light then of the electrons increased

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Number

K.E

P.E

Frequency

Potassium cathode in photocell emits electrons for a light:

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Visible

Infrared

Ultraviolet

X-rays

The unit Compton wavelength is same as:

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Compton wavelength

Compton frequency

Compton shift

Both (a) & (b)

The unit of work function is

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eV

Volt

Farad

Herdz

The energy of photon of wavelength 620 nm is:

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0.5 eV

1.0 eV

1.5 eV

2.0 eV

Davisson and Germer received the Nobel prize for their work on:

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Wave nature of particle

Corpuscular nature of wave

Dual nature of particle

All of them

The stopping potential for a certain metal is 10 volt, the max. Energy of emitted electron is:

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10 J

100 J

1.6 × 10-18 J

1.6 × 10-19 J

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