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प्रश्न
Explain the following terms:
Incident ray, Reflected ray, Angle of incidence, Angle of reflection, Normal.
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उत्तर
incident ray— The ray of light falling on the surface AB is called the incident ray. In the following figure, PN is the incident ray.
Reflected ray— The incident ray bouncing back in the same medium after striking the reflecting surface is called a reflected ray. In the following figure, NQ is the reflected ray.
Angle of incidence - The angle formed between the incident ray and the normal is the angle of incidence. (PNM is the angle of incidence.)
Angle of reflection - The angle formed between the normal and the reflected ray is called angle of reflection (MNQ is the angle of reflection)
Normal - It is the line drawn perpendicular to the reflecting surface at the point of incidence. MN is normal.
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संबंधित प्रश्न
Write true or false of the following statement.
The objects are seen around us due to irregular reflection of light.
In the following diagrams, measure and write the angle of incidence and draw the reflected ray in a given case.
In the following diagram, measure and write the angle of incidence and draw the reflected ray.
We can see a non-luminous object when the light
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?
The angle between incident ray and reflected ray is 60°. What is the value of angle of incidence?
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).
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 |
 |
| (a) | (b) | (c) |
Angle of incidence is greater than the angle of reflection.
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.
