Advertisements
Advertisements
प्रश्न
Where in nature can you find evidence that white sunlight may be made of different colours?
उत्तर
A rainbow is nature’s example to show that sunlight is made up of different colours. A rainbow is formed in the sky because of the dispersion of sunlight by millions of water droplets in the atmosphere. Every single water droplet behaves like a tiny glass prism that splits the white light into different colours. Different colours bend at different angles on passing through the water droplets, thus separating the white light into a natural spectrum of seven colours, namely, violet, indigo, blue, green, yellow, orange and red.
APPEARS IN
संबंधित प्रश्न
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
Which light has the longer wavelength : red light or blue light?
Name some everyday objects:
which absorb all the colours in sunlight
The blue colour of sky is due to:
(a) refraction of light
(b) dispersion of light
(c) diffraction of light
(d) scattering of light
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 ................
Explain in brief the reason for the following :
Advanced sunrise
Name the point on the lens through which a ray of light passes undeviated.
Answer the following question:
Why is the Tyndall effect shown by colloidal particles? State four instances of observing the Tyndall effect.
The clear sky appears blue because:
Blue colour of sky is due to the phenomenon of
