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Snell's Law

White light i...

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White light is incident normally on a glass slab. Inside the glass slab (a) Red light travels faster than other colours b) Violet light travels faster than other colours( c) Yellow light travels faster than other colours (d) All colours travel with the same speed\lbrack KCET 2012\rbrack

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Q. In glass, violet light travels faster than red light. Is the statement true?

Q. Question 8
Which of the following statements is correct regarding the propagation of light of different colours of white light in air?

(a) Red light moves fastest
(b) Blue light moves faster than green light
(c) All the colours of the white light move with the same speed
(d) Yellow light moves with the mean speed as that of the red and the violet light

Q. Assertion :In a glass medium red light travels faster than blue light Reason: Red light has a wavelength longer than blue.

Q. Is the speed of light in glass independent of the colour of light? If not, which of the two colours (red and violet) travels slower in a glass prism?

Q. Assertion :A ray of white lights shows no dispersion on emerging from a glass slab although occurs dispersion inside the glass slab. Reason: The velocity of light inside the glass slab is same for all different colours.

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