Question

solve this...........​

Answer 1

Answer:

Explanation:

1/f=1/v-1/u

u=-50

v=25

1/f= 1/25-1/50

f=50

Answer 2

Heya!

Here is ur answer..

Given,

The object is placed 50cm away from the Convex lens

The image formed at 25cm which is Real

So,

According to sign, convention,

u = 50cm

v = 25cm

f = ??

Now, from lens formula

1/f = 1/v-1/u

1/f = 1/25-(1/50)

1/f = 1/25-1/50

1/f = 2-1/50

1/f = 1/50

f = 50

f = 50cm

Therefore, focal length =50cm cm

Hope it he