Which of the following statements related to dispersion are true? (1) Red light bends the most when passing through a glass prism. (2) The angle of deviation is the same for all colours. (3) Dispersion is one of the phenomena responsible for the formation of a rainbow. (4) The speed of light decreases as the light goes from air into the prism.
Both statements 3 and 4 only
Statement (1) is incorrect: violet light bends the most through a prism, red light bends the least.
Statement (2) is incorrect: different colours have different angles of deviation because they have different wavelengths and speeds inside the prism.
Statement (3) is correct: dispersion (splitting of white light into its component colours) is one of the phenomena responsible for the formation of a rainbow.
Statement (4) is correct: light slows down as it passes from a rarer medium (air) into a denser medium (glass prism).
Hence, only statements 3 and 4 are true, So, this is the correct answer.
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Twinkling of stars is due to:
In which a convex mirror is used?
A. Rear View mirrors in vehicles
B. Glass windows
C. Makeup Mirror
D. Kaleidoscope
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The power of a lens is -2.5 D. The type of lens and its focal length are respectively:
