Physics
The diagram below shows a point source P inside a water container. Four rays A, B, C and D starting from the source P are shown upto the water surface.
(a) Show in the diagram, the path of these rays after striking the water surface. The critical angle for water-air surface is 48°.
(b) Name the phenomenon which the rays B and D exhibit.
(c) Can total internal reflection occur when rays travel from rarer medium to denser medium?
Refraction Plane Surfaces
18 Likes
Answer
(a) Below diagram shows the path of the rays after striking the water surface:
(b) Ray B shows the phenomenon of 'refraction of light' and ray D shows the phenomenon of 'total internal reflection'.
(c) No, for total internal reflection to occur, the light ray must travel from denser medium to rarer medium.
Answered By
14 Likes
Related Questions
Two lenses have power of
(a) +2 D and
(b) -4 D
What is the nature and focal length of each lens?
Study the following electric circuit. Find the reading of
(a) the ammeter and
(b) the voltmeter
Name three factors on which the deviation produced by a prism depends and state how does it depend on the factors stated by you.
(a) A boy uses blue colour of light to find the refractive index of glass, then he repeats the experiment using red colour of light. Will the refractive index be the same or different in the two cases? Give a reason to support your answer.
(b) A ray of light incident on a glass slab and follow the path as shown below. If a mirror is placed at S, such that emergent ray falls normally on it, then
I. Draw diagram to show the path of ray reflected from the mirror.
II. On the basis of which principle this refraction of ray is done?
