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Color Patterns

Band of which...

Question

Band of which of these colours is not seen in a spectrum?

(a) green
(b) yellow
(c) purple
(d) red

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Solution

(c) purple

Purple colour is not present in the spectrum.

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Similar questions

Q. Directions:- Study the following information carefully to answer the question given below.

Eight persons - A, B, C, D, E, F, G and H - are sitting around a circular table facing towards the centre, but not necessarily in the same order. All of them like different colours viz. yellow, purple, orange, black, white, green, red and blue. B is sitting second to the left of D. D likes blue colour. B does not like yellow colour. D is the immediate neighbour of those two persons who like red and purple colours respectively. Three persons sit between B and the person who likes black, yellow or purple colour. H is an immediate neighbour of both who likes red and black colours respectively.
E is sitting just opposite to H who likes orange colour.

Which of the following pairs of persons represents the immediate neighbours of G?

Q. Directions:- Study the following information carefully to answer the question given below.

Eight persons - A, B, C, D, E, F, G and H - are sitting around a circular table facing towards the centre, but not necessarily in the same order. All of them like different colours viz. yellow, purple, orange, black, white, green, red and blue. B is sitting second to the left of D. D likes blue colour. B does not like yellow colour. D is the immediate neighbour of those two persons who like red and purple colours respectively. Three persons sit between B and the person who likes black, yellow or purple colour. H is an immediate neighbour of both who likes red and black colours respectively.
E is sitting just opposite to H who likes orange colour.

Who amongst the following is sitting exactly between the person who likes red colour and F?

Q. A light bulb

14 W

emits white light, which is a mixture of various colours in the spectrum. The energy is distributed among the seven colours i.e., red, orange, yellow, green, purple, indigo and blue. If the number of photons

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(\frac{n}{time}) = 5.5 \times 10^{18} s^{- 1}

Q. Directions:- Study the following information carefully to answer the question given below.

Eight persons - A, B, C, D, E, F, G and H - are sitting around a circular table facing towards the centre, but not necessarily in the same order. All of them like different colours viz. yellow, purple, orange, black, white, green, red and blue. B is sitting second to the left of D. D likes blue colour. B does not like yellow colour. D is the immediate neighbour of those two persons who like red and purple colours respectively. Three persons sit between B and the person who likes black, yellow or purple colour. H is an immediate neighbour of both who likes red and black colours respectively.
E is sitting just opposite to H who likes orange colour.

Starting from A, if all the persons are made to sit in the alphabetical order in clockwise direction, the positions of how many persons (excluding A) will remain unchanged?

Q. Directions:- Study the following information carefully to answer the question given below.

Eight persons - A, B, C, D, E, F, G and H - are sitting around a circular table facing towards the centre, but not necessarily in the same order. All of them like different colours viz. yellow, purple, orange, black, white, green, red and blue. B is sitting second to the left of D. D likes blue colour. B does not like yellow colour. D is the immediate neighbour of those two persons who like red and purple colours respectively. Three persons sit between B and the person who likes black, yellow or purple colour. H is an immediate neighbour of both who likes red and black colours respectively.
E is sitting just opposite to H who likes orange colour.

How many persons are seated between H and D if we go clockwise from H to D?

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