Question # 1

Which is not true for X rays

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X rays are not defected by electric field

X rays are polarized

X rays consist of electromagnetic waves

X rays can be diffracted by grating

The first orbit in the hydrogen atom has a radius.

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0.53 nm

0.053 nm

0.0053 nm

0.00053 nm

In Helium Neon laser, discharge tube is filled with Neon gas.

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10%

15%

85%

90%

The series in visible region is:

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Balmer series

Pfund series

Paschen series

None of above

Bremsstrahlung radiation are examples of

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Atomic spectra

Molecular spectra

Continuous spectra

Discrete spectra

Reflecting mirrors in laser is used to

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Further stimulation

For producing more energetic lasers

Both (a) and (b)

None of these

The process by which lesser beam can be used to generate 3-dimensional images of objects is called

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Holography

Geo graphy

Tomography

Radio graphy

Helium Neon Laser Beam emitted from discharge tube has a colour.

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Blue

Green

Red

Black

Study of hydrogen visible spectrum in

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1886

1887

1895

1885

The value of Rydberg constant is

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1.0974 x 10⁷ m^-1

1.0974 x 10^-7 m^-1

1.0974 x 10⁶ m^-1

1.0974 x 10^-6 m^-1

Energy produced due to fission of uranium atom is:

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500MeV

200MeV

700MeV

750MEV

For Holography we use

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X ray

Laser

gama rays

Beta rays

The value of Rydberg constant is:

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1.0749x10⁷m^-1

1.0974 x 10⁷ m^-1

1.974 x10⁶m^-1

1.0974 x 10^-7 m^-1

In according with Bohr's theory the K.E of the electron is equal to:

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ke²/2r

Ze²/r

Ze²/r²

Ze²/2r²

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