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प्रश्न
A ______ is an artificial source of light.
पर्याय
seven
star
through
transparent
opaque
colors
shape
erect
inverted
luminous
candle
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उत्तर
A candle is an artificial source of light.
संबंधित प्रश्न
How do we see objects around us ?
Fill in the blank
A medium through which light cannot pass is called the ....................
How does light make an object visible?
Why do objects in a room become visible even if sunlight does not enter it?
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.
The mirror used in search light is ______.
Match the following.
| 1. | Ratio of height of image to height of object. | Concave mirror |
| 2. | Used in hairpin bends in mountains. | Total internal reflection |
| 3. | Coin inside water appearing slightly raised. | Magnification |
| 4. | Mirage | Convex mirror |
| 5. | Used as Dentist’s mirror. | Refraction |
State whether the following statement is True or False.
An object can be seen only if it emits light
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.
Light is a form of energy and it travels in a straight line.
