Question

If the power of lens is -0.25,then it's focpal length will be
a)-4m b)-4cm c)-400cm d)40cm ​

Answer 1

Heya!!

Focal length(in m)= 1/power

Hence f= -1/0.25

f= -4m

Hope it helps ya:)

Answer 2

Answer:

c)-400cm

Explanation:

power of lens = 1/f(in metres)

-0.25=1/f

f= -1/0.25

f= -100/25

f= -4 metres or -400 cm.