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Question
Draw a diagram to show the refraction of light through a glass prism. On this diagram, mark
(i) incident ray
(ii) emergent ray, and
(iii) angle of deviation.
(b) What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
(c) What acts as tiny prisms in the formation of a rainbow?
(d) Name the process which is involved in the formation of a rainbow.
(e) What are the seven colours seen in a rainbow?
(i) incident ray
(ii) emergent ray, and
(iii) angle of deviation.
(b) What is a rainbow? What are the two conditions necessary for the formation of a rainbow in the sky?
(c) What acts as tiny prisms in the formation of a rainbow?
(d) Name the process which is involved in the formation of a rainbow.
(e) What are the seven colours seen in a rainbow?
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Solution
(a)
(b) A rainbow is a natural spectrum of seven colours formed in the sky when the water droplets in the atmosphere cause the dispersion of sunlight. The two conditions necessary for the formation of a rainbow are as follows.
1. The sun should be shining.
2. It should be raining.
(c) Raindrops act as tiny prisms in the formation of a rainbow.
(d) The dispersion of sunlight is the process that is involved in the formation of a rainbow.
(e) The seven colours seen in a rainbow are red, orange, yellow, green, blue, indigo and violet.
(b) A rainbow is a natural spectrum of seven colours formed in the sky when the water droplets in the atmosphere cause the dispersion of sunlight. The two conditions necessary for the formation of a rainbow are as follows.
1. The sun should be shining.
2. It should be raining.
(c) Raindrops act as tiny prisms in the formation of a rainbow.
(d) The dispersion of sunlight is the process that is involved in the formation of a rainbow.
(e) The seven colours seen in a rainbow are red, orange, yellow, green, blue, indigo and violet.
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