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1.
Physical propertise shared by both radio waves and sound waves are:
i. both can be polarized. ii. both can be reflected iii. both can be both can be diffracted.
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A.
i,ii,iii
B.
ii,iii
C.
iii
D.
i,ii
E.
i

2.
Which of the following statements about electromagnetic wave is/are correct?
i. X-rays,in a vacuum travel faster than light wave in a vacuum
ii. The energy of an X-ray photon is greater than that of a light photon
iii. Light can be polarized but X-rays cannot.
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A.
i,ii
B.
ii,iii
C.
i,ii,iii
D.
ii
E.
iii

3.
A parrallel beam of white light is passed through a piece of Polaroid into a transparent specimen. When viewed through a second piece of Polaroid crossed with respect to the first, a number of coloured bands are observed in the specimen. Possible reasons for this are that the specimen is
i. being subjected to a non-uniform stress distribution
ii. causing interference in multiple slits in the Polaroid.
iii. rotating the plane of polarization of the incident light
Join or view discussions on this question
A.
i,ii,iii
B.
i
C.
ii,iii
D.
i
E.
iii

4.
Sound waves can be diffracted because they are:
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A.
longitudinal
B.
transverse
C.
stationary
D.
cannot be diffracted
E.
none of the above

5.
The pitch of a train whistle is lower when the train is approaching the listener than when it is moving away because:
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A.
the velocity of sound in air is independent of the motion of the source
B.
the velocity of sound in air is dependent of the motion of the source
C.
the velocity of sound in air is equal to that of the motion of the source
D.
the velocity of sound in air is equal to zero
E.
none of the above

6.
Which one of the following phenomenon cannot be explained by the wave theory of light?
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A.
Refraction
B.
Interference
C.
Diffraction
D.
Polarization
E.
Photoelectric effect

7.
Which of the following statements about sound waves is not correct?
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A.
can be diffracted
B.
can be polarized
C.
can be reflected
D.
travel faster in solid than in liquid
E.
travel in air

8.
Which one of the following groups of electromagnetic waves is in order of increasing frequency?
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A.
gamma-rays, ultraviolet rays, radio waves.
B.
gamma-rays, visible light, ultraviolet rays.
C.
visible light, infrared radiation, microwaves
D.
microwaves, ultraviolet rays, X-rays
E.
radio-waves, visible-light, infrared radiation

9.
When light enters glass from air:
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A.
its frequency decreases and its velocity decreases
B.
its wavelength decreases and its velocity decreases
C.
its frequency increases and its velocity increases
D.
its wavelength increases and its velocity increases
E.
none of the above

10.
In a double-slit experiment, light of wavelength 600nm gave a Fringe separation of 0.4mm on a suitably placed screen. Use of a different light source, also monochromatic gave ten fringes across a distance of 3.3mm on the same screen at the same position. The wavelength of the second source in nm, was:
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A.
50
B.
495
C.
660
D.
727
E.
7300

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