Question

1) The ratio of speed of light in air or vacuum to speed of light in a medium is
equal to_____
2) The incident ray, refracted ray and the normal ray all lie on the______
at the
point of incidence.
3) The bending effect of light as it passes from one transparent material into
other is known as____
4) The ratio sin i / sin r = a constant is called____
5) Speed of light in vacuum is____
6) Mirage is formed due to_____
7) The speed of light in rarer medium is____
than speed of light in denser
medium.
8) Critical angle of diamond is____
9) <i____
<r, when light passes from denser to rarer medium
10)____
is an optical illusion where it appears that water has collected
on the road at a distant place, but when we get there we don't find any water.
11) Refractive index depends on
____and____
12) Any two factors on which lateral shift
depends____
&___
13) Refractive index of air and benzene are 1.0003 and 1.50 respectively. Which is
the denser medium?____
14) Uses of optical fibres____
&____
15) At critical angle of incidence, the angle of refraction is_____
16) Total internal reflection takes place when light propagates from____
to
____medium
17)______
is the basic principle of optical fibre.
18) Angle of incidence for which the angle of refraction is 90° is called_____
19) A ray of light bends____
the normal when it passes from rarer to
denser medium.
20) A ray of light passing from water to air, bends____


plz answer this I will mark branliest whoever answers first and correct​

Answer 1

Answer:

19. Towards

20. away