(a) With the help of a labelled diagram, explain how a concave lens diverges a beam of parallel light rays. Mark the principal axis, optical centre, principal focus and focal length of the concave lens on the diagram.
(b) State whether concave lens has a real focus or a virtual focus.
(c) List some things that concave lens and concave mirror have in common.
Answers
Answer:
b- concave lens always make virtual,inverted ,short or position between f and optical centre
Explanation:
(a) When a concave lens has a parallel beam of light rays, After passing via the lens the lights spread (or differ). Since the refracted rays diverge from each other, they do not actually meet at a certain level. The diverging rays appear to meet on the left hand side of the lens when produced backwards at one point F called the main focus.
(b) A concave lens has a simulated focus because the light rays are not passing through the focus.
(c) Little that is common to both a concave lens and a convex mirror is as follows:
- All diverge a single luminous ray.
- All form an all-time virtual image.
- Both have an emphasis on virtuality.
You can get all the answers of Chapter 5 in the link below:
https://brainly.in/question/14963222
Few questions related to this chapter:
(a) With the help of a labelled diagram explain how a convex lens converges.....
brainly.in/question/14916723
Draw a diagram to show how a converging lens held close to the eye acts as .....
brainly.in/question/14916737
