Advertisements
Advertisements
प्रश्न
What is tyndall effect? Explain with an example.
उत्तर
The phenomenon in which light gets scattered by the colloidal particles in its path, causing the path of light to be illuminated, is called the Tyndall effect.
Example: The scattering of light can be observed when sunlight penetrates the canopy of a forest. The tiny water droplets present in the mist around the canopy scatter the sunlight in its path. This scattered light enters our eyes, enabling us to see the path of the sunlight.
APPEARS IN
संबंधित प्रश्न
Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.
What colours make up white light?
Which colour of the spectrum has
longest wavelength,
What is the colour of the sunlight scattered by the air molecules in the atmosphere?
Draw a neat and labelled diagram of the experimental set up for observing the scattering of light in a colloidal solution of sulphur to show how the sky appears blue, and the sun appears red at sunrise and sunset.
Complete the following statement:
When the sun is setting, the light from it has to travel a ................ thickness of the earth's atmosphere and only ................ wavelength ................ light is able to reach us. Sunset is therefore ................
Using the phenomenon of scattering of light, explain why there is a difference in the colour of the sun as it appears during sunrise and at noon.
Name the point on the lens through which a ray of light passes undeviated.
How can we explain the reddish appearance of sun at sunrise or sunset? Why does it not appear red at noon?
Blue colour of sky is due to the phenomenon of