Question # 1

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

From the theory of relativity, momentum p of the photon is related to energy as

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p = hfc

p = hf/c

p = f(hc,f)

p = cf/h

Practically the quantity v/c is always:

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less than one

Equal to one

Greater then one

all of these

None of these

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

A particle of mass 5.0 mg moves with a speed of 8.0 m/s. Its de-Brogile wavelength is

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1.66 m

1.66 x 10^-10m

1.66 x 10^-29cm

1.66 x 10^-29m

de-Broglies hypthesis was experimentally verified by

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Maxwell

Compton

Einstein

Davison and Germer

The special theory of relativity treats problems invoving

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inertial frame of references

accelerating frame of references

both of these

none of these

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

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Smaller

Lerger

Same

Much larger

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

In the compton's effect, it is found that the wavelength of incident x-rays is

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greater than the wavelength of scattered x-rays

equal to the wavelength of scattered x-rays

less than the wavelength of scattered x-rays

any one of these

According to the special theory of relativity, a moving clock

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runs faster

runs slower

neither runs faster nor slower

all of these

The positron was discovered by:

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In cosmic radiation

In 1932

By Carl Anderson

All above

By direc

Wave nature of particle was proposed by

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Einstein

Plank

De-Brogile

Max well

When platinum wire is heated, it appears cherry red at

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1600°C

900°C

1100°C

1300°C

When a platinum wire is heated, it appears dull red at about

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500°C

900°C

1100°C

1300°C

The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes

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2 mo

1.67 mo

0.67 mo

2.67 mo

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