Question # 1

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

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Wien's constant

Stefen's constnat

Planck's constant

Boltzmann's constant

None of these

When a position comes close to an electron they annihilate into

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one photon

two photons which travel in the same direction

two photons which travels in the opposite direction

two photons which travel in any direction

Victor de-Brogile received the Nobel prize in physics in

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1925

1929

1932

1935

The unit of work function is:

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Joule

Electron volt

That of threshold frequency

Both (A) and (B)

None of these

The concept of direction and position are purely

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absolute

relative

absolute or relative

none of these

Davision and Germer performed experiment to verify

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de-Brogile hypothesis

theory of relativity

Newton's law of gravitation

Mass-energy relation

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

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classical mechanics

Newtonian mechanics

quantum mechanics

statistical mechanics

Compton was awarded Nobel prize in physics in

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1921

1923

1925

1927

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

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1890

1895

1900

1905

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

Intensity of light determines the:

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Energy of each photon

Number of photons

Speed of photons

Size of photons

None of these

An inertial frame is that frame in which

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a>0

a=0

a<0

none of these

Electromagnetic -radiation means:

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Photons

protons

Electrons

Mesons

None of these

Newton's law of motion do not hold in

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an accelerated frame of reference

an unaccelerated frame of reference

both of these

none of these

The year when A.H. compton was awarded Nobel Prize is:

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1923

1927

1931

1935

None of these

When a platinum wire is heated, it appears white at

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1600°C

900°C

1100°C

1300°C

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