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प्रश्न
Which light has the longer wavelength : red light or blue light?
उत्तर
Red light has the longest wavelength among all the colours in the visible spectrum.
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संबंधित प्रश्न
What is meant by scattering of light? Use this phenomenon to explain why the clear sky appears blue or the Sun appears reddish at sunrise.
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
We can see the sun before the actual sunrise by about:
(a) 5 minutes
(b) 2 minutes
(c) 2 hours
(d) 20 minutes
State whether the following statements are true or false:
The scattering away of blue light makes the sun appear red at sunset.
Why are the 'danger signal' lights red in colour?
The sky appears blue because some of the blue component of sunlight is scattered by:
(a) gas molecules present in air
(b) dust particles present in air
(c) water droplets suspended in air
(d) soot particles present in air
When sunlight enters the earth’s atmosphere, state which colour of light is scattered
- the most and
- which the least.
The danger signal is red. Why?
Draw a labeled diagram to show
(i) the reddish appearance of the sun at the sunrise or the sunset and
(ii) white appearance of the sun at noon when it is overhead.
Why is the colour of the clear sky blue?
