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 polaroid is A red light filter A device used for a analyzing polarized light A device used in polarimeter An adjustable shutter
2 Monochromatic ight is of single. Frequency Wave length Amplitude Pitch
3 A monochromatic light beam when passed through a prism is. Diffracted Devlated Polarized Dispersed
4 Light waves can be polarized because they have short wavelength Have high frequency Can be reflected Are transverse
5 Light product by a single Nicole is Unpolarized Plane polarized Circulatory polarized Elliptically polarized
6 A plane of polarization is one in which vibrations take place No vibrations take place Longitudinal vibrations take place Transverse vibrations take place
7 Light wave can be polarized because they Are transverse in nature Can be reflected Have short wavelength Have high frequncies
8 With which factor disputative power of a grating increases. Order of spectrum Number of lines per centimeter Order and number of lines per centimeter Shape of the grating
9 In a diffraction pattern, the width of any fringe is. Directly proportional to slit width Inversely proportional to slit width independent of slit width Zero
10 The dispersive power of a grating is Light used Separation of lines Frequency of light used Independent of wavelength
11 When a ray of light enters from rarer medium to a denser medium its wavelength. Increases Decreases Remain constant Vanishes
12 When light enters glass from air it suffers a change in. Wavelength Wave front Velocity All of these
13 One of the device to produce plane polarized light is. A prism A bi prism A plane mirror A nicol prism
14 Newton's rings are experimentally derived from the phenomenon of. Polarization of light Resolution of light Interference of light Diffraction of light
15 A light beam is said to be plane polarized when its vibrations are restricted to only one plane Its vibrations are very strong in one plane Its vibrations take place in any plane Its vibrations are very weak in one plane
16 According to Huygen's principle Light bends round corners Light travels in a straight line All points on primary wave front are considered centre of distances Light has wave nature
17 Polarized sunglasses decrease glare on a sunny day because they Completely absorb light Block a portion of light Have a special colour refract light
18 The frequency of the fundamental mode of transverse vibration of a stretched wire 1,000 mm long is 256 Hz When the wire is shortened to 400 mm at the same tension 640 Hz 680 Hz 720 Hz 780 Hz
19 A stretched wire with clamped ends has a fundamental frequency of 1,000 Hz. What will be the new fundamental frequency if tension in the wire is increased by 2% 980 Hz 1,000 Hz 1,010 Hz 1,020 Hz
20 Diffraction is the property according to which light waves. Change their direction on entering a different medium Produce chemical effects Bend round the corners Bend towards the centre
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