Atomic Physics interview questions – page 3

MASER stands for ____

1. Microwave accelerated by the scattering of radiation
2. Modulated amplified signal emitted by radiation
3. Microwave amplification by stimulated emission of radiation
4. Microwave amplification by spontaneous emission of radiation

____ is the best light source for optical fiber communication.

1. Neon vapour lamp
2. He-ne laser
3. Semiconductor laser
4. Ruby laser

Which of the following is a coherent source of light?

1. Tungsten filament lamp
2. Mercury vapour lamp
3. Laser light
4. Sodium vapour lamp

The specific charge was determined by ____

1. Goldstein
2. Rutherford
3. Chadwick
4. J.J. Thomson

When canal rays pass through the gas, they ___ the gas.

1. Neutralize
2. Condense
3. Compress
4. Ionize

The cathode rays are ____

1. The same as canal rays
2. A stream of uncharged particles
3. A stream of positive ions
4. A stream of electrons

The chromium ions doped in the ruby rod ____

1. Absorbs red light
2. Absorbs green light
3. Absorbs blue light
4. Emits green light

At atmospheric pressure which of the following are poor conductors of electricity?

1. Metals
2. Air and other gases
3. Copper
4. Aluminum

Cathode rays travel in ___

1. Curved paths
2. Parabolic paths
3. Straight lines
4. Circular paths

Canal rays were discovered by ____

1. Neil Bohr
2. Rutherford
3. E. Goldstein
4. J.J. Thomson

The particle discovered from greenish glow in a discharge tube is ____

1. Helium particles
2. Neutrons
3. Protons
4. Electrons

____ is defined as number of waves per unit length.

1. Rydberg’s number
2. Bohr number
3. Wave number
4. Radiation number

The cathode of the Coolidge tube is made up of ___

1. Aluminium
2. Iron
3. Tungsten
4. Copper

Hard X-rays have ____

1. High frequency
2. High energy
3. High penetrating power
4. All the above

X-rays are ____ waves.

1. Electrical
2. Sound
3. Magnetic
4. Electromagnetic

____ is used to determine wavelength of X-rays.

1. Spectrometer
2. Michelson interferometer
3. Bragg’s spectrometer
4. Bainbridge spectrometer

Which law was helpful in determining the atomic number of rare earth elements?

1. Bragg’s law
2. Pauli’s law
3. Periodic law
4. Moseley’s law

The colour of light that emerges from ruby laser is ____

1. Red
2. Blue
3. Green
4. Yellow

Laser is used in brain and eye surgery because _____

1. It penetrates through eye and brain easily
2. It is harmless
3. It cuts the tissues easily
4. It seals small blood vessels they cut through

Holography is the process of producing ____

1. Three dimensional images by laser
2. Images by laser
3. Photography using laser
4. Signals by laser

The crystal used in Bragg’s spectrometer to diffract X-rays is ___

1. Ammonium carbonate
2. Copper sulphate
3. Sodium chloride crystal
4. Zinc sulphide

According to Bohr’s postulates, which of the following quantities take discrete values?

1. Angular momentum
2. Momentum
3. Potential energy
4. Kinetic energy

Electrons were discovered by ____

1. Sommerfeld
2. Neil Bohr
3. Rutherford
4. J.J. Thomson