PPSC Physics Chapter 5 Waves and Wave Properties of Light With Answers

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PPSC Physics Chapter 5 Waves and Wave Properties of Light

Sr. # Questions Answers Choice
1 A LASER beam may be used to measure very large distance because it is. Unidirectional Coherent Monochromatic Massive
2 LASER is a device for Producing a beam of white light Producing a beam of monochromatic and coherent light Producing a beam of high intensity incoherent light. Producing highly penetrating's X -rays
3 LASER beam can be used to generate three dimensional images objects in the process called. Tomography Holography Autography Biography
4 X-rays can cause Malaria Dysentery Cancer Blood pressure
5 The use fulness of x rays is largely due to their Mass Density Penetrating power Rest mass
6 x-rays can cause fluorescence in materials such as Cadmium Zinc sulphide Palatinocyanide All of these
7 X-rays are a part of electromagnetic spectrum and are characterized by frequencies higher that those of. Infrared radiation Ultraviolet radiation Far ultraviolet radiation Far infrared radiation
8 X-rays eject electrons from matter by Pair production Pair annihilation Compton effect Photoelectric effect
9 The penetrating power of X rays is least with materials of. High mass density High volume density High electron density High weight
10 X-rays travels ins straight line with velocity Less than light Greater than light Equal to light Equal to sound
11 In the experiment of production of X rays the anti cathode should be bombarded with. A particles Beta particles Electrons Protons
12 operation of a LASER depends upon Spontaneous emission of radiation The existence emission of radiation The existence of atoms in normal state The existence of atoms in metastable state
13 Mostly widely used types of gas LASER are. Neon Argon ion Helium All of these
14 LASER is a device which can produce Monochromatic beam of light Coherent beam of light An intense beam of lgiht All of these
15 X -rays are similar in nature to. Alpha particles Beta particles Gama rays Photons
16 The maximum energy of photons emitted from ab X rays tube is certain to be increased by Increasing the voltage across the tube Decreasing the voltage across the tube Heating the metal target Putting a barrier in the way of photons
17 In the experiment of production od x rays electrons are accelerated towards the anode by Thermionic emission Potential difference Breaking potential Cut of currrent
18 Bracket and plunk series of spectral lines lye in the Visible region Ultraviolet region Far infrared region Infrared region
19 The wavelength of Pascha series lies is the Visible region Ultraviolet region Infrared region Invisible region
20 Balimer series lies in the Visible region Invisible region Infrared region Far infrared region
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