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

image
image
image

PPSC Physics Chapter 5 Waves and Wave Properties of Light

Sr. # Questions Answers Choice
1 All particles, of a wave front vibrate In same phase In opposite phase Upward down Left and right
2 Huygen's wave theory falls to explain Diffraction polarization Interference Refraction
3 If in Young's double slit experiments the separation between two slits is halved then the fringe width Remains unchanged Becomes double Reduces to half Becomes 3 times
4 Maximum number of orders available with a grating is. Independent of grating element Directly proportional to grating element Inversely proportional to grating element Directly proportional to wavelength
5 The fact that the edge of a shadow formed by a point source of light shining on an object is not sharp is an example of. Refraction Diffraction Polarization Dispersion
6 When white light is incident on a diffraction grating, the light that will eb deviated from central image will be. White Yellow Red Blue
7 A point source of light is situated at large distance The nature of the wave front at the point will be. Cylindrical Spherical Plane Ellipical
8 Polarization is characteristic of. Light wave sound waves Waver waves x-rays
9 The wave phenomenon that classifies light as a transverse wave is. Polarization Diffraction Interference Refraction
10 Light from the sun reaches the earth in Spherical wave fronts Cylindrical wave fronts Plane wave fronts Packets
11 The fundamental frequency of a sound source is 256 Hz. What is the frequency of the first harmonic. 64 128 256 512
12 Three tuning forks of frequencies 400 Hz. 401 Hz and 402 Hz are sounded together The frequency of beats per sound is. 0 1 2 3
13 Two tuning forks have same natural frequency One of them is now loaded with wax. When both the forks are sounded together the will Produce interference Produce vibrations Remain in resonance Produce beats
14 When temperature increases, frequency of an organ pipe Decreases Increases Remain the same Become zero
15 When the source and observer are moving away from each other the apparent pitch will Increases Decreases Be zero Be infinite
16 For polarization , the direction of oscillation has to be perpendicular to the direction of travel sound waves are longitudinal waves so they cannot be. Reflected Deflected Diffracted polarized
17 Stationary waves are produced when two identical waves are moving on the string. Along the same direction Along the opposite direction Along the perpendicular direction Of length 1 m
18 Two tuning forks of frequencies 260 Hz and 257 Hz are sounded together the number of beats produced per seconds is. 1 3 4 257
19 Beats are the results of. Diffraction of sound waves Interference Polarization Timber
20 Ultra sonics are the Frequencies in the audible range Frequencies greater than 20 Hz Frequencies greater than 20 KHz Frequency lower than 20 KHz
Download This Set

Is this page helpful?

×