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प्रश्न
What is light? Define it.
उत्तर
Light is a form of Energy i. e. The external physical cause that affects our eye to produce the sensation of vision.
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संबंधित प्रश्न
Can light travel in vacuum ?
Write true or false of the following statement.
The moon is self-luminous.
Select the correct alternative.
The natural source of light is
Fill in the blank
The brightness of light is measured in ...................
Fill in the blank
A ............. is formed when the path of light is obstructed by an ..............
Fill in the blank
Speed of light in vacuum is .................
Write true or false
Opaque objects do not allow light to pass through them.
Answer the following.
Write down five man-made sources of light.
A ______ is an artificial source of light.
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.
