Question

observe the following statement (a) focal length of lens depends on the surrounding medium? (b) focal length of lens changes with the object distance​

Answer 1

Answer:

Explanation:

(A) The focal length of a lens is depended on the surrounding medium. The reason behind this phenomenon is that the angle of refraction of a lens is depended on the indices of refraction of the medium of lens and the incoming medium and the difference in their indices.

(B)To focus an object 1 m away (s1 = 1,000 mm), the lens must be moved 2.6 mm farther away from the image plane, to s2 = 52.6 mm. The focal length of a lens determines the magnification at which it images distant objects

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Answer 2

Answer:

The focal length of a lens is depended on the surrounding medium. The reason behind this phenomenon is that the angle of refraction of a lens is depended on the indices of refraction of the medium of lens and the incoming medium and the difference in their indices

Explanation: