NCERT Solutions for Chapter: Light, Exercise 1: Exercise

Seema dropped a water droplet on a newspaper. She found that the letters are appearing larger through the droplet.

Why are the letters appearing larger through the droplet?

Which of these is true about the image formed by a concave lens?

Ayesha keeps a toy in front of a plane mirror. She then looks at the mirror to see the image of the toy.

At which point will the image of the toy be formed in the mirror?

What type of image is formed in the mirror?

Shreya spins a multicoloured wheel rapidly.

What colour will the rapidly spinning wheel appear to be?

When two plane mirrors are at a right angle with each other, the number of images viewed is _____.

When two plane mirrors are parallel to each other, the number of images of an object we can see is _____.

Two identical mirrors are placed in a hollow cylindrical tube as shown in the figure. A light ray incident on one of the mirrors undergoes multiple reflections. If the length of each mirror is $3 \mathrm{m}$, and the velocity of light is $3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}$,  then find the time taken by the light ray incident on the mirror to come out of the hollow cylinder.