List four precautions which a student should ...

CBSE Class 10 Science 2019 Delhi Set 1

Question : 27 of 28

Marks: +1, -0

List four precautions which a student should observe while determining the focal length of a given convex lens by obtaining image of a distant object on a screen.

Solution:

Preacutions are as follows:

(i) Fix the lens vertically in lens holder.

(ii) Base of lens and white screen shoule be in a line with measuring scale.

(iii) There should not be any obstacle in path of lens.

(iv) Record the position of lens and screen when sharp image is formed.

Go to Question:

Prev Question