# An object 2 cm high is placed at a distance of 64 cm from a white screen.

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An object 2 cm high is placed at a distance of 64 cm from a white screen. On placing a convex lens at a distance of 32 cm from the object it is found that a distinct image of the object is formed on the screen.

1. What is the focal length of the convex lens?

a. 14 cm

b. 15 cm

c. 16 cm

d. 17 cm

2. What is the size of the image formed on the screen?

a. Less than the size of object

b. Greater than size of object

c. Same size as object

d. None of these

3. What is the height of the image?

a. 1 cm

b. 2 cm

c. 3 cm

d. 4 cm

4. Power of convex lens is

a. Positive

b. Negative

5. A full length image of a distant tall building can definitely be seen by using

a. A concave lens

b. A convex lens

c. A plane lens

d. Both concave as well as plane lens

## 1 Answer

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1. c. 16 cm

2. c. Same size as object

3. b. 2 cm

4. a. Positive

5. b. A convex lens

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