Physics
(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?
Related Questions
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?
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 ray of light PQ falls normally on the hypotenuse of a right angled prism ABC as shown below
(a) Copy the diagram and complete the path of ray PQ till it emerges from the prism.
(b) What is the value of the angle of deviation of the ray?
(c) Name an instrument where this action of prism is used.
A linear object is placed on the axis of a lens. An image is formed by refraction in the lens. For all positions of the object on the axis of the lens, the positions of the image are always between the lens and the object.
(a) Name the lens.
(b) Draw a ray diagram to show the formation of the image of an object placed infront of the lens at any position of your choice except infinity.