10th Light

Front

The radius of curvature of a convex lens is 20cm. What is its focal length?

Back

10 cm

Front

Name the type of mirrors used in the following situations: (i) Used by Dentist. (ii) Rear-view mirror of vehicle

Back

(i) Converging mirror (ii) Diverging mirror

Front

In the given ray diagram, which of the following path of the refracted ray is correct?

Back

Front

An object is kept at a distance of 4m in front of a spherical mirror, which forms its erect image at a distance of 1m from the mirror. What is the magnification? Is the mirror concave or convex?

Back

m = +1/4, Convex Mirror

Front

A concave mirror produces a three times magnified image on a screen. If the object is placed 20cm in front of the mirror, what is the image distance?

Back

-60 cm

Front

Calculate the power of a lens whose focal length is +40 cm. Identify the nature of the lens.

Back

P = +2.5 D, Convex lens

Front

Complete the path of the refracted ray of the given incident light on the given convex lens.

Back

Front

The image of a candle flame placed at a distance of 30cm from a mirror is formed on a screen placed in front of the mirror at a distance of 60cm from its pole. What is the nature of the mirror? Find its focal length.

Back

F = - 20 cm, Concave Mirror, Real & Inverted Image

Front

Order of mirror combinations for a magic mirror where the head appears bigger, the middle portion of the body appears the same size, and the legs appear smaller.

Back

Concave, plane and convex

Front

The refractive indices of glass and water with respect to air are 3/2 and 4/3 respectively. If the speed of light in glass is 2 x 10⁸ m/s, find the speed of light in water.

Back

2.25 x 10⁸ m/s