Physics
(a) The velocity of light in diamond is 121000 km/s. What is its refractive index?
(b) With the help of a labelled diagram, show that the apparent depth of an object such as a coin in water is less than its real depth.
Related Questions
An object of height 5 cm is placed perpendicular to the principal axis of a concave lens of focal length 10 cm. If the distance of the object from the optical centre of the lens is 20 cm, determine the position, nature and size of the image formed using the lens formula.
(a) Figs. I and II show the incident and transmitted rays through lens kept in a box in each case. Draw the lens and complete the path of rays through it.
(b) What is the difference between double convex and bi-convex lens?
(c) Does convex lens always form real images?
(a) A stick partly immersed in water appears to be bent. Draw a ray diagram to show the bending of the stick when placed in water and viewed obliquely from above. On which phenomenon, it is based?
(b) Two parallel rays of orange and green light in air, meet an air-water interface as shown below
I. Complete the diagram for path inside water.
II. What conclusion will you draw for this?
(a) What are the necessary conditions for TIR?
(b) Draw a diagram to show how rays of light are totally reflected when fall normally on the face of a right angled prism. Where is this action of prism used?