Question

Which colour is at the upper and lower end of visible spectrum? *

a) Red and violet respectively

b) Red and yellow respectively

c) Violet and red respectively

d) Violet and orange respectively

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Answer 1

Answer:

Light at the lower end of the visible spectrum, having a longer wavelength, about 740 nm, is seen as red; light in the middle of the spectrum is seen as green; and light at the upper end of the spectrum, with a wavelength of about 380 nm, is seen as violet.

Answer 2

a) Red and violet respectively