Question : Rainbow are produced when sunlight:
Option 1: incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
Option 2: incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection
Option 3: incident on raindrops hanging in the atmosphere is dispersed after suffering reflection
Option 4: None of the given statements is correct
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Correct Answer: incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection
Solution : The correct option is incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Rainbows emerge when sunlight enters raindrops in the atmosphere, bends (refracts) as it passes from air to water, and then reflects off the drop's interior surface. Because of the varying wavelengths, this reflection generates dispersion, which separates light into its distinct colours. The refracted and internally reflected light exits the raindrop, resulting in the gorgeous rainbow spectrum. The most common colour sequence in a rainbow is red, orange, yellow, green, blue, indigo, and violet, which is frequently recalled by the abbreviation "ROYGBIV."
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Question : Why does the water tank appear shallower when viewed from the top?
Option 1: Due to reflection
Option 2: Due to refraction
Option 3: Due to diffraction
Option 4: Due to total internal reflection
Question : Which one of the following processes is responsible for the glittering of air bubbles rising through water?
Option 1: Reflection of light
Option 2: Refraction of light
Option 3: Total internal reflection of light
Option 4: Scattering of light
Question : Optical fibres are based on the phenomenon of which of the following?
Option 1: Interference
Option 2: Dispersion
Option 3: Diffraction
Option 4: Total internal reflection
Question : A pond of water appears less deep due to:
Option 1: reflection
Option 2: diffraction
Option 3: refraction
Option 4: polarisation
Question : Select the most appropriate ANTONYM of the word ‘Optimistic’ from the given sentence.
After the incident, Radha prepared herself to stay positive even on gloomy days.
Option 1: stay
Option 2: incident
Option 3: positive
Option 4: gloomy
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