Advertisements
Advertisements
Question
Define the following term
Normal
Advertisements
Solution
Normal: The perpendicular line drawn from, the point of incidence to the plane of reflecting surface is called normal.
APPEARS IN
RELATED QUESTIONS
Select the correct alternative
The angle of incidence on a plane mirror is 30°.The angle of reflection will be:
A ray of light falls normally on a plane mirror. What is the angle of incidence ?
In the following diagrams, measure and write the angle of incidence and draw the reflected ray in a given case.
The following diagram shows an incident ray AO and the normal ON on a plane mirror. Find the angle of incidence and angle of reflection.
Define the following term
Incident ray
A small hole P is made in a piece of cardboard. The hole is illuminated by a torch as shown in the following figure. The pencil of light coming out of the hole falls on a mirror.
At which point should the eye be placed, so that the hole can be seen?
Draw figure showing the position of the plane mirror. Also, label the angle of incidence and angle of reflection on it.
There is a mistake in each of the following ray diagrams given as figures a, b, and c. Make the necessary correction (s).
 |
 |
 |
| (a) | (b) | (c) |
Diffused reflection gives a sharp image.
Assertion (A): A ray incident along normal to the mirror retraces its path.
Reason (R): In reflection, the angle of incidence is always equal to the angle of reflection.
