Question # 1

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

A non-inertial frame of reference is one, in which

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law of inertial is valid

all laws of physics are the same in all frames

a>0 or a<0

a=0

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

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Remains constant

Decreases

Increases

Reduces to zero

The length contraction happens only

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Opposite to the direction of motion

along the direction of motion

perpendicular to the direction of motion

In any direction

When platinum wire is heated, it appears cherry red at

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1600°C

900°C

1100°C

1300°C

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

G.P. Thomson observer experimentally that electrons and neutrons possess

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particle-like properties

wave-like properties

neither particle nor wave like properties

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

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

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decreases

first increases then decreases

increases

any one of them

When a platinum wire is heated, it appears yellow at

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1600°C

900°C

1100°C

1300°C

Electromagnetic -radiation means:

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Photons

protons

Electrons

Mesons

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

Compton studied the scattering of x-rays by loosely bound electrons from:

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NaCl crystal

Graphite crystal

Zirconia

Copper crystal

None of these

According to the Max plank, energy is redialed or absorbed in

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discrete packets

continuous waves

either of them

none of these

The way through which electromagnetic radiations or photons interact with matter depends upon their:

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Wavelength

Frequency

Energy

Temperature

All of these

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