Question

How are power and focal length of a lens related? You are provided with two lenses of focal length 20 cm
and 40 cm respectively. Which lens will you use to obtain more convergent light?​

Answer 1

Answer: Testosterone hormoe secreted by testes

Explanation:

CHANGES: -

- Growth of facial , pubic chest hair

-Testes begin to produce male gametes (sperms)

-Shoulders broaden

-Voice begins to crack/ becomes hoarse

Answer 2

★$\large\mathcal\blue{Answer:→}$

Power of lens is inversely proportional to the focal length of the lens. Lens with focal length 20 has more power than a lens with a focal length of 40 cm. Lens with higher power should be used to obtain more convergent light.