If the radius of curvature of a spherical mirror is 40 cm, what is its focal len
Practice Questions
Q1
If the radius of curvature of a spherical mirror is 40 cm, what is its focal length?
10 cm
20 cm
30 cm
40 cm
Questions & Step-by-Step Solutions
If the radius of curvature of a spherical mirror is 40 cm, what is its focal length?
Step 1: Understand that the radius of curvature (R) of a spherical mirror is given as 40 cm.
Step 2: Know the formula for the focal length (f) of a spherical mirror, which is f = R/2.
Step 3: Substitute the value of R into the formula: f = 40 cm / 2.
Step 4: Calculate the result: f = 20 cm.
Focal Length of Spherical Mirrors – The relationship between the radius of curvature (R) and the focal length (f) of a spherical mirror, where f = R/2.
