Question

A student uses two convex lenses separately. One is thicker and other in thinner, to obtain the sharp image of the distant tree. After getting the clear image on the screen by using both lenses separately, he is most likely to observe that the distance between the lens and screen is greater in which lens?​

Answer 1

Answer:

the distance between thicker lens and the screen is less as compared to the distance between thinner lens and screen because the focal length is lesser in first one while is greater in thinner lens

Answer 2

Answer:

When the student uses two convex lenses separately, one being thicker thant the other.

Then obtains a sharp image of the a distant tree in both the lenses. It would be observed that

the distance between the lens and screen is greater in thinner lens, than thicker lens.

Explanation:

• Concept used: Focal length of the mirror.

• The focal length of the thinner lens is greater than than thicker lens.

Focal length: Focal length of an optical system is the system is a measure of how strongly the system converges or diverges light.

Formula to calculate focal length of a mirror:

f = - R/2

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