Problem 5.1

Making use of the spectral response curve for an eye (see Fig. 5.1 , find: (a) the energy flux corresponding to the luminous flux of $1.0 \mathrm{~lm}$ at the wavelengths 0.51 and $0.64 \mu \mathrm{m}$ (b) the luminous flux corresponding to the wavelength interval from 0.58 to $0.63 \mu \mathrm{m}$ if the respective energy flux, equal to $\Phi_{e}$ $=4.5 \mathrm{~mW},$ is uniformly distributed over all wavelengths of the interval. The function $V(\lambda)$ is assumed to be linear in the given spectral interval.