Question

फोकल लेंथ ऑफ़ लेंस इस 25 सेंटीमीटर व्हाट इज द पावर. इन इंग्लिश​

Answer 1

Answer:

Power of lens is P=  

f

1

​  

 ,focal length should be in meter

f=−25cm=−.25m

so P=  

−0.25

1

​  

=−4D

Since the focal length is negative, it is a concave lens or diverging lens.

Explanation: