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प्रश्न
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
Draw a labelled ray diagram to show the formation of a rainbow.
उत्तर
The rainbow is a natural phenomenon in which white sunlight splits into beautiful colors by water droplets, which remain suspended in the air after the rain. It appears as a circular arc of various hues, with violet on the inside and red on the outside. Only when the sun is behind the observer and the rain is in front of the observer can a rainbow be seen. Red, orange, yellow, green, blue, indigo, and violet are the seven colours that make up the rainbow, and they are arranged from the outer to the inner edge.
Formation of a rainbow:
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संबंधित प्रश्न
What is the order of colours in a rainbow, from the outside to the inside?
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
State whether the following statements are true or false:
The scattering away of blue light makes the sun appear red at 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 ................
What is meant by advance sunrise and delayed sunset? Draw a labelled diagram to explain these phenomena.
What is the colour of the clear sky during day time? Give reason for it.
A beam of blue, green and yellow light passes through the earth's atmosphere. Name the colour which is scattered the most.
Which colour of white light is scattered the least? Give reason.
Draw a labelled diagram to show (i) reddish appearance of the sun at the sunrise or the sunset and (ii) white appearance of the sun at noon when it is overhead.
Twinkling of stars is due to atmospheric
