Consider the following statements 1 Dispersion and internal reflection play an important role ...........

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Consider the following statements.

1. Dispersion and internal reflection play an important role in the formation of rainbows.

2. Danger signal lights are red in colour as it is scattered the most in atmosphere improving its visibility.

Which of the above is/are correct?

1 only

2 only

Both 1 and 2

None

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Explanation:

Justification: Statement 1: A rainbow is a natural spectrum appearing in the sky after a rain shower. It is caused by dispersion of sunlight by tiny water droplets, present in the atmosphere. A rainbow is always formed in a direction opposite to that of the Sun. The water droplets act like small prisms. They refract and disperse the incident sunlight, then reflect it internally, and finally refract it again when it comes out of the raindrop. Due to the dispersion of light and internal reflection, different colours reach the observer’s eye.
Statement 2: ‘Danger’ signal lights are red in colour. The red is least scattered by fog or smoke. Therefore, it can be seen in the same colour at a distance.