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N A M e .. C Oll e G E

This document contains an 18 question test on optics and sound covering topics like refraction, total internal reflection, lenses, prisms, electromagnetic waves, sound waves, and properties of different types of radiation. The test examines concepts related to refractive index, critical angle, dispersion of light, image formation using lenses, and characteristics of visible light, ultraviolet rays, infrared rays, and sound.

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Varun Lâlwáñí
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65 views2 pages

N A M e .. C Oll e G E

This document contains an 18 question test on optics and sound covering topics like refraction, total internal reflection, lenses, prisms, electromagnetic waves, sound waves, and properties of different types of radiation. The test examines concepts related to refractive index, critical angle, dispersion of light, image formation using lenses, and characteristics of visible light, ultraviolet rays, infrared rays, and sound.

Uploaded by

Varun Lâlwáñí
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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ICSE ANNUAL TEST SERIES 2014-15

N
(QUESTIONS ARE PRINTED ON BOTH SIDES OF THE PAPER)
Maximum Marks: 40 a
1. Distinguish between refraction and Total internal reflection on m
two points. e
and sound

[2]
2. On which factors does the refractive index of a medium depend?
[2]
3. P Q
A ray of monochromatic light enters a
piece of glass PQRS as shown and makes
an angle of 420 with PQ. If the critical angle
of glass is 420, complete the path of the
S R
ray till it emerges from the glass.
[3]
4. How is lateral displacement produced by an optical block related
to:
LIght

(a) thickness of the block (b) refractive index of block (c)



wavelength of incident light (d) angle of incidence.
[2]
5. Draw a diagram of a prism showing all angles when an incident
ray passes through the prism at an angle of minimum deviation.
[3]
6. A coin lies at the bottom of a trough in which the height of water
is 15 cm. Given refractive index of water as 4/3, find how much is

the coin seen to be raised from the bottom.
[2]
7. Which type of lens has (a) a positive power (b) a negative power.
[1]
8. Why do windows sometimes rattle when a bus passes in front of
a building?
[1]

9. A boy stands in front of a cliff on the other side of a river. He fires
a gun and hears an echo after 6s. The boy then moves 170 m
backward and gains fires the gun. Now he hears an echo after 7 ..
s. Calculate (a) the width of the river and (ii) the speed of sound. C
[3] oll
10. State the physical quantity whose unit is decibel. Name
another unit of this physical quantity.
e
[2] g
11. Name three characteristics of a musical sound and write their e:
corresponding objective quantities.
[3]
12. Mention two properties of a wave: one property which varies
and the other which remains constant when the wave passes

from one medium to another.
[2]
13. Name any two electromagnetic waves which have a frequency
higher than that of violet light. State one usage of each.
[2]
14. Which type of prism is used to obtain the infrared radiation?
Why?
[2]
15. How will you detect (a) infrared waves (b) radio waves?
[2]
ICSE ANNUAL TEST SERIES 2014-15

16. Name three properties of ultraviolet radiations which are


similar to visible light.
[3]
17. State any two such properties of infrared radiations which are
not true for visible light.
[2]
18. Draw a ray diagram for a virtual image using a biconvex lens.
[3]

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