Question # 1

By modern system of NAVSTAR, the speed any where on the earth can be determined to accuracy about.

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20 ms-1

10 ms-1

2 cms-1

2 ms-1

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

Compton shift is maximum for scattering angle of photon

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0^o

90^o

180^o

45^o

Compton's effect is associated with

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gamma rays

Beta rays

X rays

Positive rays

The wavelength associated with the protons moving at speed of 40 m/s is.

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7.20 nm

9.02

15.7 nm

17.3 nm

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

Max planck received noble prize in:

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1927

1932

1918

1914

The minimum energy required for occurrence of pair production is:

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1.022eV

1.02keV

1.02Me.V

1.04MeV

Wave nature of light appears in

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Pair production

Compton effect

Photo electric

Interference

We can never accurately describes all aspects of sbatomic particles simulatanously. It is correct according to:

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Uncertainity Priciple

De-broglie Theory

Einstin Theory

Photo electric effect

The principle regarding the dual nature of light was first discovered by

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Heisenberg

Compton

J.J.Thomson

De-Broglie

Compton effect proves.

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Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

De-Broglie waves are associated with

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Moving charged particles only

Moving neutral particles only

All moving particles

All parties whether in motion or at rest

The energy of the photon of wavelength 500 nm is.

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3.10 eV

2.49 eV

1.77 eV

1.52 eV

In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of.

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90^oC

Zero

120^oC

45^oC

Energy of Black body radiation depends upon

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Nature of surface of body

Nature of material of body

Shape and size of body

Temperature of the body

Which one of the following paved the way for modern physics

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Newtonian mechanics

Theory of relativity

Quantum theory

All of above

In the equation if f₂ > then

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