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प्रश्न
Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature, the glass piece is not seen.
Why is the light of a single colour used ?
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उत्तर
Light of a single colour is used because the refractive index of a medium (glass or liquid) is different for the light of different colours.
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संबंधित प्रश्न
A student traces the path of a ray of light passing through a rectangular glass slab and marks the angle of incidence i, angle of refraction r and angle of emergence e, as shown.
The correctly marked angle(s) is/are
(A) ∠ i only
(B) ∠ e only
(C) ∠ r only
(D) ∠ i and ∠ e
With the help of diagram of the principal section of a prism, indicate its refracting surfaces, refracting edge and base.
How does the angle of deviation produced by a prism change with increase in the angle of incidence. Draw a curve showing the variation in the angle of deviation with the angle of incidence at a prism surface.
How does the angle of minimum deviation produces by a prism change with increase in :
the wavelength of incident light
The critical angle for glass-air is 45° for the light of yellow colour. State whether it will be less than, equal to, or more than 45° for (i) ref light, (ii) blue light?
Which colour of light travels fastest in any medium except air?
A total reflecting equilateral prism can be used to deviate a ray of light through:
Why is the colour red used as a sign of danger?
Name the material for which the refractive index is found to be maximum.
