Question

Abhishek uses two lenses I and II of same size and same material as shown P1 and P2 are the powers of A and B. An object is kept at the same distance from the lenses between F and 2F of each lens on the principal axis in turn Let I1 and I2 be the image formed by two lenses respectively. Which one of the following statements is correct for the images formed?

(a) Distance or image I2 will be less than dis- tance or image I1 from the lens

(b) Size or image I1 will be equal to size or image I2.

(c) Distance of image I2 will be greter than distance or image I1 irom the lens.

(d) Size of image I1 wil be lesser than size or image I2.​

Answer 1

Answer:

c

Explanation:

distance of image 12 will be greater than distance or image 11 from the lens

Answer 2

Distance or image I2 will be less than distance or image I1 from the lens.

• We know that the lenses that are thicker have less focal length than the lenses that are thinner.

• We can say that thickness of a lens is inversely proportional to its focal length.
• The bending of light will be more in the case of a thicker lens and the bending of light will be less in the case of a thinner lens.

Therefore, option (a) is correct. Distance or image I2 will be less than distance or image I1 from the lens.