A lens is cut from the optical centre along the principal axis and the two parts of the lens are placed sideways as shown in figure. Then the new focal length of the combination:

Question

A lens is cut from the optical centre along the principal axis and the two parts of the lens are placed sideways as shown in figure. Then the new focal length of the combination: (A) Remains the same (B) Becomes double (C) Becomes half (D) Becomes triple

Tardigrade Admin · Accepted Answer

Correct answer is (c) Becomes half

Q. A lens is cut from the optical centre along the principal axis and the two parts of the lens are placed sideways as shown in figure. Then the new focal length of the combination:

Remains the same

Becomes double

Becomes half

Becomes triple

Correct answer is (c) Becomes half