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(a) What is meant by Tyndall effect ?
(b) How is scattering of light different from reflection of light ?
(c) What will happen if white light (sunlight) is scattered from (i) very small particles of medium, and (ii) very large particles of medium ?
(b) How is scattering of light different from reflection of light ?
(c) What will happen if white light (sunlight) is scattered from (i) very small particles of medium, and (ii) very large particles of medium ?
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(a) Tyndall Effect :- The phenomenon of scattering of light by the colloidal particles which makes the path of light visible. This is called Tyndall effect. (1)
(b) Scattering of light depends on size of particles of colloid and wave length of colour of light while reflection of light is independent of both of them. (1)
(c) (i) Scatter the Short wavelength colours of sunlight (½)
(ii) White light scattered (½)
(b) Scattering of light depends on size of particles of colloid and wave length of colour of light while reflection of light is independent of both of them. (1)
(c) (i) Scatter the Short wavelength colours of sunlight (½)
(ii) White light scattered (½)