Dual Nature Of Matter Question 4
Question 4 - 2024 (29 Jan Shift 2)
Two sources of light emit with a power of $200 W$. The ratio of number of photons of visible light emitted by each source having wavelengths $300 nm$ and $500 nm$ respectively, will be :
(1) $1: 5$
(2) $1: 3$
(3) $5: 3$
(4) $3: 5$
Show Answer
Answer: (4)
Solution:
$n _1 \times \frac{hc}{\lambda _1}=200$
$n _2 \times \frac{hc}{\lambda _2}=200$
$\frac{n _1}{n _2}=\frac{\lambda _1}{\lambda _2}=\frac{300}{500}$
$\frac{n _1}{n _2}=\frac{3}{5}$
