Advertisements
Advertisements
प्रश्न
Name the point on the lens through which a ray of light passes undeviated.
उत्तर
The point on the lens through which a ray of light passes undeviated is known as Pole.
APPEARS IN
संबंधित प्रश्न
Which light has the longer wavelength : red light or blue light?
Which phenomenon makes us see the sun:
a few minutes before actual sunrise?
Which phenomenon makes us see the sun:
a few minutes after actual sunset?
We can see the sun before the actual sunrise by about:
(a) 5 minutes
(b) 2 minutes
(c) 2 hours
(d) 20 minutes
What is the colour of the sunlight:
scattered by the dust particles in the atmosphere?
The red colour of the sun at the time of sunrise and sunset is because:
(a) red colour is least scattered
(b) blue colour is least scattered
(c) red colour is most scattered
(d) blue colour is most scattered
In an experiment to study the scattering of light by passing a beam of white light through a colloidal solution of sulphur in a transparent glass tank:
Which colour is observed from the sides of the glass tank? Does this colour correspond to the colour of sky on a clear day or the colour of sky around the sun at sunset?
Why does the sun appear red at sunrises and sunset?
State the difference in colours of the sun observed during sunrise/sunset and noon. Give explanation for each.
Answer the following question:
Why is the Tyndall effect shown by colloidal particles? State four instances of observing the Tyndall effect.
