Advertisements
Advertisements
Question
What is a virtual image?
Solution
When the rays of light reflecting from an object appear to meet in a virtual form, then the images formed in this way are called virtual images.
APPEARS IN
RELATED QUESTIONS
Write true or false
A virtual image formed by a spherical mirror is always erect and situated behind the mirror.
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
Define the following terms in the context of spherical mirrors :
(i) Pole
(ii) Centre of curvature
(iii) Radius of curvature
(iv) Principal axis
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
The sun is seen before the sunrise and after the sunset.
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?