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Question: What will be the wave number of radiation having wavelength 5000 \(\overset{o}{A}\)?...

What will be the wave number of radiation having wavelength 5000 Ao\overset{o}{A}?

A

2×1016m2 \times 10^{16}m

B

2×1010m2 \times 10^{10}m

C

2×106m2 \times 10^{6}m

D

2×104m2 \times 10^{4}m

Answer

2×106m2 \times 10^{6}m

Explanation

Solution

: 5000Ao=5000×10−10m5000\overset{o}{A} = 5000 \times 10^{- 10}mor 5×10−7m5 \times 10^{- 7}m

υ__=1λ=15×10−7m=2×106m−1\overset{\_\_}{\upsilon} = \frac{1}{\lambda} = \frac{1}{5 \times 10^{- 7}m} = 2 \times 10^{6}m^{- 1}