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प्रश्न
The laws of reflection hold true for ______.
विकल्प
plane mirrors only
concave mirrors only
convex mirrors only
all reflecting surfaces
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उत्तर
The laws of reflection hold true for all reflecting surfaces.
Explanation:
The laws of reflection are fundamental principles of optics that describe how light behaves when it hits a surface. These laws state:
- The angle of incidence is equal to the angle of reflection.
- The incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane.
संबंधित प्रश्न
State the uses of plane mirrors.
State two effects caused by the refraction of light.
State whether the following statement is true or false:
Refraction occurs because light slows down in denser materials.
Water is optically .......... than air.
Air is optically .......... than glass.
Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by:
(a) a concave mirror, and (b) a convex mirror
Define the principal focus of a concave mirror.
Lights of different colours are used as signal for safety transport. From these, the wavelength of red light is _______ nm.
Why does a ray of light bend when it travels from one medium to another?
Match the following:
| Column I | Column II | ||
| 1. | r > 90 | a. | Light gazes at the surface of separation between the two modes. |
| 2. | r = 90 | b. | No refraction. |
| 3. | r < 90 | c. | Refracted ray away from the normal |
