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प्रश्न
Fill in the following blank with suitable word:
Light bends when is passes from water into air. We say that it is ............
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उत्तर
Light bends when is passes from water into air. We say that it is refracted.
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संबंधित प्रश्न
| Column I | Column II | Column III | |
| 1 | Dispersion | Long-sightedness | Twinkling of stars |
| 2 | Refraction | Splitting of white light into component colours | Convex lens |
| 3 | Hypermetropia | Change in the direction of the ray of light due to change in medium | Spectrum of seven colours |
A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface?
Write the word AMBULANCE as it would appear when reflected in a plane mirror. Why is it sometimes written in this way (as its mirror image) on the front of an ambulance?
A ray of light passes from air into a block of glass. Does it bend towards the normal or away from it?
What is meant by 'refraction of light'? Draw a labelled ray diagram to show the refraction of light.
What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light?
Light travels more quickly through water than through glass.
Which is optically denser : water or glass?
The depth of a pond when seen from above appears to be less.
Light travels at a lower speed in water than in air.
When a ray of light travels from water to air, it bends ............. the normal.
Draw suitable diagrams to illustrate how a beam of light incident parallel to the principal axis is reflected by:
(a) a concave mirror, and (b) a convex mirror
Numerical problems.
The speed of light in water is 2.25 × 108 ms–1. If the speed of light in vacuum is 3 × 108 ms–1, calculate the refractive index of water.
The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is called ______.
How does the light travel?
Light travels fastest in a vacuum. Why?
The ratio of the sine of the angle of incidence to the sine of ______ is constant.
Twinkling of stars and Mirage are the two phenomena occurring due to refraction.
Which is optically denser out of the two medium M1& M2 having the refractive indices = 1.71 and 1.36 respectively?
When a ray of light travels normal to the given surface, then the angle of refraction is ______.
