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Electromagnetic Spectrum

Which of the ...

Question

Which of the following represents an infra-red wavelength?

10^{- 4} c m

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10^{- 5} c m

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10^{- 6} c m

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10^{- 7} c m

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Solution

The correct option is C $10^{- 4} c m$
Infrared radiation extends from the nominal red edge of the visible spectrum at $700 n m$ to $1 m m$ .
and only $10^{- 4} c m$ comes under this range.
The correct option is A.

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We can construct an unique quadrilateral ABCD with AB = 4 cm, BC = 6 cm, AC = 7 cm, CD = 5 cm and BD = 8 cm.

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