Structure of Atom - Result Question 3
####3. The value of Planck’s constant is $6.63 \times 10^{-34} Js$. The speed of light is $3 \times 10^{17} nm s^{-1}$. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of $6 \times 10^{15} s^{-1}$ ?
[NEET 2013]
(a) 25
(b) 50
(c) 75
(d) 10
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Solution:
- (b) $c=0 \lambda$
$\lambda=\frac{c}{v}=\frac{3 \times 10^{17}}{6 \times 10^{15}}=50 nm$
