Question

Power of lens is 5d what is the focal length of nature of lenses

Answer 1

Answer:

Given:

Power of lens = 5D

To find:

Focal length and nature of lens.

Calculation:

Since power is positive, we can definitely say that the lens is a convex lens

Now , we know that formula for calculation of power is as follows:

P = 1/f ,

where P is power and f is focal length( in metres).

Putting the values,

P = 1/f

=> 5 = 1/f

=> f = 1/5

=> f = 0.2 metres

=> f = 20 cm.

Answer 2

Answer:

Explanation:

Power of lens = 5d

focal lenght of nature of lenses = ?

we know that;

f=1/5

f =0.2m

f =20cm

Nature of image real, inverted and same size of the object.