Advertisements
Advertisements
Question
How is the focal length of a spherical mirror related to its radius
Advertisements
Solution
The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature.
Focal length = Radius of curvature / 2
Or 2 F = R
APPEARS IN
RELATED QUESTIONS
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
Explain the following term related to spherical lenses:- principal axis
Image formed by a convex ______ is always virtual and smaller in size.
What is a virtual image?
Name the kind of mirror used to obtain:
A virtual and enlarged image
Draw a ray diagram to show the formation of image of an object kept in front of a convex mirror. State three characteristics of the image.
What is the difference between virtual images of an object formed by a concave mirror and a convex mirror?
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
