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प्रश्न
Write true or false of the following statement.
Light travels in a straight-line path.
पर्याय
True
False
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उत्तर
True
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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 |
Fill in the blank
A medium through which light cannot pass is called the ....................
List two artificial sources of light.
Write true or false
The earth has its own light.
Answer the following.
Differentiate between luminous and non-Luminous objects.
Sunlight is a blend of______ colors
Speed of light in air is 3 × 108 m s–1 and the refractive index of a medium is 1.5. Find the speed of light in the medium.
a) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is:
- at C
- between C and F
- between F and P of the mirror.
b) Mention the position and nature of image in each case.
Boojho made light from a laser torch fall on a prism. Will he be able to observe a band of seven colours? Explain with a reason.
Look at the figure given in the following figure.
Will there be any difference in the shadow formed on the screen in A and B.
