Terms Related to Spherical Mirrors

Q. The correct relation between the focal length (f) ​
and radius of curvature (R) of a spherical mirror is:​

1. R = f
2. R = 2f
3. R = 3f
4. R = 4f

Q.

The relationship between the focal length f and radius of curvature R for a spherical mirror is:

1. $f=2R$

2. $f=\frac{R}{2}$

3. $R=2f$

4. $R=4f$

Q. What is focal lenght?

Q.

The focal length of a convex mirror is half of its _________ of curvature

Q.

For a spherical mirror, the radius of curvature $R$ and focal length $f$are correlated as,

1. $f=2R$

2. $R=2f$

3. $R=\frac{f}{2}$

4. $R=f$

Q. What is the relationship between the focal length $f$ and radius of curvature $R$ for a spherical mirror?

1. $f=2R$
2. $f=2R$
3. $R=2f$
4. $R=4f$

Q. Define:
(i) Focus
(ii) Focal length, for a spherical mirror.
If the focal length of a convex mirror is $20\text{cm}$, find its radius of curvature.