Physics ICS Part 2 Chapter 20 Online MCQ's Test With Answers

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Physics ICS Part 2 Chapter 20 Online MCQ's Test

Sr. # Questions Answers Choice
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
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