Table of Contents
What is the radius of curvature if focal length is 20 cm?
ACCORDING TO the condition, the radius of curvature; R is equal to 20 cm. Using the WELL known relation R=2 f, the Magnitude of the focal length is f=20/2 cm= 10 cm.
How do you find the radius of curvature when focal length is given?
The relation between focal length (f) and radius of curvature (R) of a spherical mirror is that the focal length is equal to half of the radius of curvature i.e. f=R2.
What is the focal length if radius of curvature is 30 cm?
=> f = 15 cm.
When radius of curvature of a mirror is 20 cm the focal length is 10 cm?
Q2. The radius of curvature of a spherical mirror is 20 cm. What is its focal length? Therefore, the focal length of the spherical mirror is 10 cm.
What is the focal length of curved mirror of radius of curvature is 40 cm 20 cm 35 cm 25 cm 40 cm?
Since the focal length is half the length of the radius of curvature. The focal length comes out to be 20 cm.
Why is focal length half of radius of curvature?
Proving the focal length is half the radius of curvature: Taking a concave mirror, the curved mirror will have a principal axis near which a ray of light is incident on the mirror parellel to it. Hence, in both cases Radius is double the focal length.
Is the radius of curvature the focal point?
The distance from the vertex to the center of curvature is known as the radius of curvature (represented by R). The radius of curvature is the radius of the sphere from which the mirror was cut….The Anatomy of a Curved Mirror.
| Principal axis | Center of Curvature | Vertex |
|---|---|---|
| Focal Point | Radius of Curvature | Focal Length |
What is the focal length of concave mirror of radius of curvature 16cm?
Answer: 32cm is the answer.
What is the focal length of a convex mirror whose radius of curvature is 32cm?
So, according to your question the radius of curvature of a convex mirror is 32cm. 16 cm. So the focal length of the convex mirror is 16cm.
How is Focal Length related to Radius of Curvature? Definition : The equation relating the object distance (u) the image distance (v) and the mirror focal length (f) is called the mirror formula. The mirror has a small aperture. The object lies close to principal axis of the mirror.
What is the radius of curvature of a concave mirror?
Solution: The radius of curvature of the mirror = 30 cm Thus, the focal length of the mirror = = 15 cm Example 4: An object is placed at a distance of 15 cm from a concave mirror of focal length 10 cm. Find the position of the image.
What is the distance of the object from the mirror?
Example 5: A 3 cm long object is placed perpendicular to the principal axis of a concave mirror. The distance of the object from the mirror is 15 cm, and its image is formed 30 cm from the mirror on the same side of the mirror as the object .
What is the distance of the insect from the mirror?
∴ The distance of insect from the mirror is also equal to 1.5 m. The image is formed at 1.5 m behind the mirror. Example 3: A concave mirror is made up by cutting a portion of a hollow glass sphere of radius 30 cm. Calculate the focal length of the mirror.