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प्रश्न
Answer the following.
Differentiate between luminous and non-Luminous objects.
उत्तर
Luminous
The bodies which have the light of their own e.g. sun stars, bulb, candle, oil lamp, torch, a lantern.
Non-Luminous
The bodies-which do not have their own light. e.g. moon, chair, table. When light falls on them, they become visible.
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संबंधित प्रश्न
Match the following
| (a). A light ray passes from air to glass | (1) . speeds up |
| (b). A light ray passes from glass to water | (2). reflects red light |
| (c). Virtual image | (3). primary colours |
| (d). Red rose | (4). plane mirror |
| (e). Red, green, and blue | (5). slows down |
Write true or false of the following statement.
Light travels in a straight-line path.
Write true or false of the following statement.
A shadow is formed because light travels in a straight-line path.
Name two natural sources of light.
List two artificial sources of light.
Tick the correct answer.
Substance which don’t allow light to pass through them,
Match the following.
| Group A | Group B |
| (a) Mirror | (1) Non-luminous |
| (b) Firefly | (2) Inverted image |
| (c) Pinhole camera | (3) Reflection |
| (d) Moon | (4) Luminous |
Choose the translucent substance from the following
Write about two everyday situations that tell you that light travels in a straight line.
What is light?
