Question # 1

Due to relative motion of observer and the frame of reference of events, time always:

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Dilates itself

Contracts itself

Stretches itself

Both (A) and (C)

None of these

The existence of position was predicted by Dirace in

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1920

1925

1930

1928

Pair production is the phenomenon in which

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matter is converted into energy

energy is converted into matter

light is converted into electrical energy

electrical energy is converted into light

The general theory of relativity treats problems involving

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inertial frame of references

accelerating frame of references

both of these

none of these

Max Planck received the Nobel Prize for his discovery of energy quants in:

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1718 AD

1918 AH

1818 AD

1918 AD

None of these

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

According to the de-Brogile relation, an object of large mass and ordinary speed has

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very small wavelength

very large wavelength

very small frequency

all of these

Absolute motion cannot be detected

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in its own frame of references

in a different frame of references

both in its frame and different frame of references

none of these

In process of annihilation of matter, the two photons produced move in opposite direction to converse

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momentum

charge

energy

mass

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

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1923

1927

1931

1935

None of these

The inside cavity of the black body is

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painted white

painted silver

blackened with soot

painted red

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

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ON switch

off switch

function switch

none of these

The special theory of relativity is based on:

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Four postulates

Three postulates

Two postulates

One postulate

None of these

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

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number of photoelectrons

size of the photoelectrons

charge on photoelectrons

K.E of photoelectrons

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 special theory of relativity is based on the

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one postulate

two postulates

three postulates

four postulates

The value of the plank's constant 'h' is given by

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1.6 x 10^-19J

1.67 x 10^-27Kg

6.63 x 10³⁴Js

6.63 x 10^-34Js

Victor de-Brogile received the Nobel prize in physics in

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1925

1929

1932

1935

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