EASY
7th CBSE
IMPORTANT
Earn 100

Give two differences between the image formed in a plane mirror and convex mirror, when the object is held close to the mirror.

Important Questions on Light

EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 15 - Light>EXERCISES>Q VI

How will you distinguish between a convex lens and a concave lens, without touching them?

EASY
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 15 - Light>EXERCISES>Q VI

Name the coloured arc formed in the sky after the rain. Which colour is on the top of the arc and which colour is at the base of the arc?

MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 15 - Light>EXERCISES>Q VI

How can you prove that a convex lens converges the sunrays to a single point?

MEDIUM
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 15 - Light>EXERCISES>Q VI

Describe an experiment to prove that a prism splits light into seven colours.

HARD
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 15 - Light>EXERCISES>Q VII
When Ranjit holds his finger about 6 cm from the mirrors A, B and C placed flat on a table. He observes (i) in mirror A, the image of finger is of same size, (ii) in mirror B, the image of the finger is enlarged, and (iii) in mirror C, the image of the finger is diminished. He wants to know the basic cause of such image formation, so he shares his observation with his friend Sunil. Sunil explains such things properly.
Answer the following question based on above information: 
What are the values displayed by Sunil?
 
HARD
7th CBSE
IMPORTANT
Learning Elementary Science for Class 7>Chapter 15 - Light>EXERCISES>Q VII
When Ranjeet holds his finger about 6 cm from the mirrors A, B and C placed flat on a table. He observes (i) in mirror A, the image of finger is of same size, (ii) in mirror B, the image of the finger is enlarged, and (iii) in mirror C, the image of the finger is diminished. He wants to know the basic cause of such image formation, so he shares his observation with his friend Sunil. Sunil explains such things properly.
Answer the following questions based on above information: 
Find the name of mirrors A, B and C respectively according to their characteristics give one use of each mirrors.