A Do rods have their peak sensitivity at a higher or lower frequency than cones? B. Do rods and cones have similar sensitivities near the red or near the violet edge of the visible spectrum? C. Is it easier to detect a dim red source or a dim violet source of light?

visible range approximately: 400nm(blue) to 700nm(red)

a) as visible form graph rods have peak sensitivity at lower wavelength, a lower wavelength means a higher frequency thus rods have their peak sensitivity at higher frequency than cones.

b)similar sentitivies mean the graphs intersect which is around 700nm thu red edge of spectrum

c)relative sensitivity is more for wavelength around 350 nm thus easier to detect dim violet light