Question

A convex lens has:

विकल्प

• Negative power (\[f < 0\])

• Negative power (\[f > 0\])

• Positive power (\[f > 0\])

• Positive power (\[f < 0\])

Answer 1

For a convex (converging) lens the focal length is positive, \[f > 0\], and since \[P = \frac{1}{f}\], its power is positive.