Assertion : When a beam of light is passed through colloidal solution placed in dark place the path of the beam become visible.Reason : Light gets scattered by colloidal particles.
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Answer:
Assertion : When a beam of light is passed through colloidal solution placed in dark place the path of the beam become visible. Reason : Light gets scattered by colloidal particles.
Explanation:
Both A and R are true, and R is correct explanation of the assertion
When a beam of light is passed through a colloidal solution, placed in a dark room the beam of light is scattered by the colloidal particles and the path of the beam becomes visible. The phenomenon is called Tyndall effect.
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Assertion and reason both are correct. Reason is correct explanation for assertion.
Explanation:
- Colloids are mixtures in which microscopically dispersed insoluble particles of one substance are suspended in another substance.
- The size of the suspended particles in a colloid can range from 1 to 1000 nanometres.
- Colloids are heterogeneous mixtures in which the particle size is too small to be seen with the naked eye, but is big enough to scatter light.
- Particles of colloids easily scatter a beam of visible light.
- This scattering of a beam of light is called the Tyndall effect.
- Tyndall effect is a phenomenon in which beams of light incident on colloids are scattered due to the interactions between the light and the colloidal particles.
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