Question # 1

When a high energy photon interact with a metal, which of the following effect is most likely to be taken place

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pair production

photoelectric effect

Compton effect

None of these

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

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Max plank

Newton

Einstein

J.J. Thomson

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

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2.9 s

3.0 s

6.6 s

9.6 s

The positron was discovered by:

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In cosmic radiation

In 1932

By Carl Anderson

All above

By direc

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

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pair production

Compton effect

photoelectric effect

relativity

When a platinum wire is heated, it appears yellow at

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1600°C

900°C

1100°C

1300°C

Photoelectric effect takes place with a photon of:

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Very high energy

Very low energy

Low energy

High energy

None of these

the dilation of time applies to the timing processes which are:

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Physical

Chemical

Biological

All of these

None of these

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

Electromagnetic radiation or photons interact with matter in

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two distinct ways

three distinct ways

four distinct ways

five distinct ways

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

de-Broglies hypthesis was experimentally verified by

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Maxwell

Compton

Einstein

Davison and Germer

S.I. unit of planks constant is

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J-s^-1

J.s

J.s^-2

J.s²

Victor de-Brogile received the Nobel prize in physics in

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1925

1929

1932

1935

The concept of direction is purely:

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Absolute

Relative

Relative to stars always

Relative to the sun always

None of these

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

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100 J

1.6 x 10^-17J

100 eV

1.6 x 10^-17eV

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

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1923

1927

1931

1935

None of these

As the light shines on the metal surface, the electrons are ejected

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slowly

instantaneously

either of these

none of these

0.1 kg mass will be equivalent to the energy

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9 x 10¹⁵J

5 x 10⁸J

6 x 10¹⁶J

9 x 10^-16J

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