A screen receives 3 W of radiant flux of wav | vedclass

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(D) The luminous flux $\phi$ is given by the formula $\phi = \frac{P}{P_0} 	imes V(\lambda) 	imes K,$ where $P$ is the radiant flux,$V(\lambda)$ is

Vedclass · Accepted Answer

$1.37 	imes 10^3 \ lm$

Vedclass · Answer

(D) The luminous flux $\phi$ is given by the formula $\phi = \frac{P}{P_0} 	imes V(\lambda) 	imes K,$ where $P$ is the radiant flux,$V(\lambda)$ is the relative luminosity,and $K$ is the luminous efficacy of the reference wavelength $(5550 \ \mathring{A})$.Given:Radiant flux $P = 3 \ W$Relative luminosity $V(6000 \ \mathring{A}) = 0.685$Luminous efficacy $K = \frac{1}{1.5 	imes 10^{-3}} \ lm/W$Calculating the luminous flux:$\phi = \frac{3 \ W}{1.5 	imes 10^{-3} \ W/lm} 	imes 0.685$$\phi = 2000 	imes 0.685 \ lm$$\phi = 1370 \ lm = 1.37 	imes 10^3 \ lm$.

Column-$1$	Column-$2$
$(a)$ Speed	$(i)$ Increases
$(b)$ Its amplitude	$(ii)$ Decreases
	$(iii)$ Remains constant

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