Question

20. Read the following and answer any four questions.
Refraction explain some sfrange effects which you may
have already noticed. The bottom of the swimming pool,
for example, always looks closer to the surface than it really
is. Similarly, a fish near the bottom of a river or a pond is
always deeper than it seems. The light entering your eye
from point A on the fish appears to come from point A'. Your
eye sees the fish higher up than it really is. The apparent
depth is less than the real depth.
1) Which of the following phenomenon is the cause of above situation?
a) Reflection b) Refraction c) Dispersion d) Both (a) and (b
) The light entering your eye from point A on the fish appears to be from A' because
a) light travelled from less denser medium to denser medium
b) light travel from denser medium to less denser medium
c) The apparent depth is more than real depth
d) None of these
Aray of light passes from air into water. The angle of refraction will be
a) equal to the angle of incidence b) greater than the angle of incidence
c) smaller than the angle of incidence d) 45°
iv) Refractive indices of water, sulphuric acid, glass and carbon dioxide are 1.33, 1.43,
1.53 and 1.63 respectively. In which of these media a ray of light incident obliquely at
same angle would bend the most?
a) Water b) Glass
c) Carbon dioxide d) Sulphuric acid
5
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Answer 1

Answer:

Explanation:

.

Refraction explain some sfrange effects which you may

have already noticed. The bottom of the swimming pool,

for example, always looks closer to the surface than it really

is. Similarly, a fish near the bottom of a river or a pond is