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प्रश्न
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उत्तर
Three distinctions between light and sound waves are
(a). Light waves can travel through a vacuum while sound waves cannot.
(b). Light waves are transverse waves while sound waves are longitudinal waves.
(c). The velocity of light in air is 3 x 108 m/s while the speed of light in air is just about 330 m/s.
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संबंधित प्रश्न
Draw a figure describing the following.
The reflecting surface of two mirrors make an angle of 90∘ with each other. If a ray incident of one mirror has an angle of incidents of 30∘, draw the ray reflected from the second mirror. What will be its angle of reflection?
Explain the following term:
Reflected ray. Draw diagram/diagrams to show them.
What type of mirror is used to obtain a real image-of an object?
Copy the figure. By taking two rays from point A, show the formation of image. State four characteristics of the image.
You are provided a convex mirror, a concave mirror and a plane mirror. How will you distinguish between them, without touching or using any other apparatus?
Dull materials reflect light.
______ through which light can pass partially.
Match the following:
| 1. | Rubber | a. | Erect |
| 2. | Greased paper | b. | Inverted |
| 3. | Real image | c. | Opaque medium |
| 4. | Virtual image | d. | Translucent medium |
What kind of surface reflects light?
We can see objects because of ______.
