Question 102: Dual Nature of Matter and Radiation

Question

Two sources of light emit with a power of $$200 \mathrm{~W}$$. The ratio of number of photons of visible light emitted by each source having wavelengths $$300 \mathrm{~nm}$$ and $$500 \mathrm{~nm}$$ respectively, will be :

Accepted Answer

$$\begin{aligned}
& \mathrm{n}_1 	imes \frac{\mathrm{hc}}{\lambda_1}=200 \
& \mathrm{n}_2 	imes \frac{\mathrm{hc}}{\lambda_2}=200 \
& \frac{\mathrm{n}_1}{\mathrm{n}_2}=\frac{\lambda_1}{\lambda_2}=\frac{300}{500} \
& \frac{\mathrm{n}_1}{\mathrm{n}_2}=\frac{3}{5}
\end{aligned}$$

Answer

$$5: 3$$

Answer

$$3: 5$$

Answer

$$1: 5$$

Answer

$$1: 3$$

Dual Nature of Matter and Radiation

Two sources of light emit with a power of $200 \mathrm{~W}. The ratio of number of photons of visible light emitted by each source having wavelengths 300 \mathrm{~nm} and 500 \mathrm{~nm}$ respectively, will be :

Choose the correct answer: