## The refractive index of diamond is 2.42. What is the meaning of this statement?

Q.  The refractive index of diamond is 2.42. What is the meaning of this statement?   Answer:- The diamond with refractive index of 2.42, is the most ‘optically denser medium’ and…

## You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in Table 10.3.

Q. You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in Table 10.3.    Answer:- Using the information given in…

## Find out, from Table 10.3, the medium having highest optical density. Also find the medium with lowest optical density.

Q. Find out, from Table 10.3, the medium having highest optical density. Also find the medium with lowest optical density.    Answer:- The medium having highest optical density : Diamond (…

## Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s–1.

Q. Light enters from air to glass having refractive index 1.50. What is the speed of light in the glass? The speed of light in vacuum is 3 × 108 m s–1….

## A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?

Q. A ray of light travelling in air enters obliquely into water. Does the light ray bend towards the normal or away from the normal? Why?   Answer:- The light ray…

## A concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located?

Q. A concave mirror produces three times magnified (enlarged) real image of an object placed at 10 cm in front of it. Where is the image located?    Answer:- Here given…

## Find the focal length of a convex mirror whose radius of curvature is 32 cm.

Q. Find the focal length of a convex mirror whose radius of curvature is 32 cm.    Answer:- We know,for spherical mirrors of small apertures, the radius of curvature is twice…

## Why do we prefer a convex mirror as a rear-view mirror in vehicles?

Q. Why do we prefer a convex mirror as a rear-view mirror in vehicles?    Answer:- Convex mirrors are commonly used as rear-view (wing) mirrors in vehicles because they give an…