Question

Which colored light bulb - red, orange, yellow, green, or blue- emits photons with (a) the least energy and (b) the greatest energy? Account for your answers.

Answer 1

$\left(a\right)$ Red-colour light bulb emit photons with the lowest frequency compared to light bulbs of other colours.

$\therefore$ Red-colour light bulb emits photons with lowest energy.

$\left(b\right)$ Colour Blue appears next to violet in the continuous visible spectrum $\therefore {\nu }_{Blue}<{\nu }_{violet}$ but greater than other colours given here.

Hence, Blue- Colour light bulb emits photons with greater energy.