Explain with the help of a diagram, why the convex lens is also called a converging lens.
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A convex lens also known as converging type because it converges a parallel beam of light rays passing through it.
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The refractive indices of three media are given below :
Medium
Refractive Index
A
1.6
B
1.8
C
1.5
A ray of light is travelling from $A$ to $B$ and another ray is travelling from $B$ to $C$. (a) In which of the two cases the refracted ray bends towards the normal? (b) In which case does the speed of light increase in the second medium? Give reasons for your answer.
Write the formula for a lens connecting image distance (υ), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?
Draw a diagram to represent a convex mirror. On this diagram mark principal axis, principal focus F and the centre of curvature C if the focal length of convex mirror is 3cm.
A 5cm tall object is placed perpendicular to the principal axis of a convex lens of focal length 18cm at a distance of 12cm from it. Use lens formula to determine the position, size and nature to the image formed.