If a concave and convex lens of equal focus are kept in contact what is the effective focal length?

kwisangqaquqw3
2022-05-10
Answered

If a concave and convex lens of equal focus are kept in contact what is the effective focal length?

You can still ask an expert for help

rynosluv101swv2s

Answered 2022-05-11
Author has **19** answers

When two lenses are kept in contact, powers of the lenses are simply added.

Power of a lens is positive for convex lens and negative for concave lens.

Numerically power of a lens is given by $\frac{100}{f}$ were f is focal length in centimeters.

As numerically, focal length is same but opposite in size, combined power will be

Zero i.e. focal length is $\mathrm{\infty}$ i.e. it is just equivalent to plane glass,

Power of a lens is positive for convex lens and negative for concave lens.

Numerically power of a lens is given by $\frac{100}{f}$ were f is focal length in centimeters.

As numerically, focal length is same but opposite in size, combined power will be

Zero i.e. focal length is $\mathrm{\infty}$ i.e. it is just equivalent to plane glass,

asked 2022-05-10

What type of reflection is an echo?

asked 2022-05-18

How does refraction affect the appearance of the sky?

asked 2022-04-30

How is wave refraction measured?

asked 2022-04-07

How can optical fiber be used for communication?

asked 2022-05-19

Why is total internal reflection used in surgery?

asked 2022-05-13

How does the index of refraction relate to speed of light?

asked 2022-05-19

Why is the index of refraction a unique property of a medium?