# Refraction of Light Class 10

## Image Formation in Lenses Using Ray Diagrams

• Ray diagram helps us to study the nature, position and relative size of the image formed by lenses.
• For drawing ray diagrams we first consider how light rays falling on both concave and convex lens in three different ways get refracted.
• First consider the case for convex lens
• Secondly consider the case for concave lens

• The ray diagrams for the image formation in a convex lens for a few positions of the object are summarized below in the table
• The ray diagrams for the image formation in a concave lens for a few positions of the object are summarized below in the table

Given below are the links of some of the reference books for class 10 Science.

You can use above books for extra knowledge and practicing different questions.

### Practice Question

Question 1 Which among the following is not a base?
A) NaOH
B) $NH_4OH$
C) $C_2H_5OH$
D) KOH
Question 2 What is the minimum resistance which can be made using five resistors each of 1/2 Ohm?
A) 1/10 Ohm
B) 1/25 ohm
C) 10 ohm
D) 2 ohm
Question 3 Which of the following statement is incorrect? ?
A) For every hormone there is a gene
B) For production of every enzyme there is a gene
C) For every molecule of fat there is a gene
D) For every protein there is a gene

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