Question

2) State whether the following statement is true or false.

Focal length of concave lens is negative.​

Answer 1

Answer:

Hi mate...

Hence the given statement is true..

Answer 2

Answer:

The given statement is true.

Focal length is always negative for cancave lens.

Focal length is always positive for convex lens.

Explanation:

What is focal length?

• The distance of the focus from pole of the mirror is called its focal length.

• f = PF

• When an object is between the focus and Pole, the image is behind the mirror. It is virtual , upright and magnified.

• When an object is placed at Infinity l, the image will be at the focus.

• When an object is placed at focus, the image will be formed at infinity.

• It is real, inverted and highly magnified.