Question

एक लेंस की क्षमता + 1D है । उसकी फोकस दूरी है (क) 50 cm
(ख) 100 cm
(ग) 25 cm
(घ) 20 cm

Answer 1

Answer:

5o

Explanation:

plx is 6PM for punjabi

Answer 2

Answer:

P=1/f

So ,it will be

F=1/p

By using this formula answer is it will be f=1/1

= 1m = 100cm is the answer