1 |
For Holography we use |
X ray
Laser
gama rays
Beta rays
|
2 |
Which is not characteristic of Laser. |
Monochromatic
Coherent
Intense
Multi direction
|
3 |
The first laser was built by |
ArthursSchawalow
T.H.Maiman
Peter Sorokin
C.H.Townes
|
4 |
In Helium Neon laser, the discharge tube is filled with |
80% He, 20% Neon
85% He, 15% Neon
83% He, 17% Neon
90% He, 10% Neon
|
5 |
Laser is a beam of light which is |
Monochromatic
Coherent
Unidirectional
All of these
|
6 |
Helium Neon Laser Beam emitted from discharge tube has a colour. |
Blue
Green
Red
Black
|
7 |
Laser can be made by creating. |
Meta stable
Population inversion
Excited state
All of these
|
8 |
When meta I is heated sufficiently electrons are given off by the metal. This phenomenon is known as. |
Photoelectric effect
Piezo electric effect
Thermionic emission
Secondary emission
|
9 |
Bremsstrahlung radiation are examples of |
Atomic spectra
Molecular spectra
Continuous spectra
Discrete spectra
|
10 |
X- ray diffraction reveals that these are |
Particle type
Wave type
Both wave and particle
None of above
|
11 |
Kx -Xrays are produced due to transition of electron from. |
K to L shell
L to K shell
M to K shell
M to L shell
|
12 |
In Helium Neon laser, discharge tube is filled with Neon gas. |
10%
15%
85%
90%
|
13 |
The rest mass x ray photon is |
Infinite
Zero
1.67 X<sup>-17</sup> kg
All of the above
|
14 |
Which is not true for X rays |
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
|
15 |
Production of x rays is reverse process of |
Photo electric effect
Compton effect
An nihilation
Pair production
|
16 |
Photons emitted in inner shell transition are. |
Continuous X -rays
Discontinuous X rays
Characteristic X rays
Energetic X rays
|
17 |
In an electronic transition atom cannot emit. |
Infrared radiations
Visible radiations
Ultraviolet radiations
Gama radiations
|