Advertisements
Advertisements
प्रश्न
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
उत्तर
There are seven colours in a full spectrum of white light. The various colours of a spectrum in their order, starting with red, are as follows.
Red
Orange
Yellow
Green
Blue
Indigo
Violet
APPEARS IN
संबंधित प्रश्न
Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an observer on the moon? Justify your answer with a reason.
With the help of a labelled diagram, explain why the sun appears reddish at the sun-rise and the sun-set.
What colours make up white light?
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.
What happens when a beam of sunlight enters a dusty room through a window? Explain your answer.
Why are the 'danger signal' lights red in colour?
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.
Describe an experiment to show that “sunlight is essential for photosynthesis”.
Twinkling of stars is due to atmospheric
