NEET 2013 Chemistry question
The value of Planck's constant is Js. The speed of light is nm s. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of s ?
Answer: (3)
Solution
Wavelength, frequency and speed of light are related by . Since is given in nm s, comes out directly in nm: \dfrac{c}{ν}\dfrac{3×10^{17}\ nm s^{-1}}{6×10^{15}\ s^{-1}}$ =
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