Advertisements
Advertisements
Question
Name two factors on which the focal length of a lens depends.
Solution
Focal length depends on :
(1) Curvature of the lens
(2) Material medium of the lens
APPEARS IN
RELATED QUESTIONS
Find the nature and focal length of a spherical mirror whose radius of curvature is +24 cm.
If the focal length of a spherical mirror is 12.5 cm, its radius of curvature will be:
(a) 25 cm
(b) 15 cm
(c) 20 cm
(d) 35 cm
Which type of mirror has:
positive focal length?
What type of image/images are formed by:
a concave mirror?
Where would the image be formed by a convex mirror if the object is placed:
at infinity?
Draw labelled ray-diagrams to show the formation of image in both the case.
What is the advantage of using a convex mirror as rear-view mirror in vehicles as compared to a plane mirror? Illustrate your answer with the help of labelled diagrams.
What is the effect on the size and position of the image of moving the object (i) towards the lens, and (ii) away from the lens?
The mirror used as rear-view mirror in vehicles ______.
The most common example of a convex mirror is the make – up mirror.
