Question

State whether true or false:
In a convergent beam of light all the light rays meet at a point.
A. True
B. False

Answer 1

Hint: As the name suggests convergent beam will converge and meet at a point known as focus. Concave mirror and a concave lens are used to converge light into one point. With the light ray diagrams of the concave mirror and convex lens, we can define the convergent beam of light rays.

Complete step by step answer:
Convergent beams of light rays will come together at a single point and known as focus.
For concave mirrors or converging mirrors, the path of light rays is shown below.

For convex lens or converging lens, the path of light rays is shown below.

Both figures are showing the converging behaviour of light after the reflection or refraction from a converging mirror or converging lens. These converging beams of light meet at a point known as focus. So, the correct option is A.

Additional information:
A spherical mirror is a part of a reflective sphere. It has a centre of curvature, which corresponds to the centre of the sphere, a radius of curvature, which corresponds to the radius of the sphere and a focal point.
Focal length of spherical mirror is given by,
\[f=\dfrac{R}{2}\], where R is the radius of curvature.
This is an approximation. Only parabolic mirrors can really focus the parallel rays to a single focal point.
For spherical mirrors,
If the inside surface is reflective, then the mirror is concave.
If the outside surface is reflective, then the mirror is convex.
Concave mirrors can form either real or virtual images. While, convex mirrors can form only virtual images. A virtual image is formed because the light rays can be extended back to meet the image position, but they won’t go through the image position.

Note: Divergent beams of light are the light rays from a point source that travel in all directions. Parallel beams of light that incident on either convergent mirror or convergent lens will focus at one point after the reflection or refraction. It is better to remember optical instruments like lenses and mirrors used to converge or diverge the beam of light rays to explain these kinds of problems.