Question

p.8.6 formative 2
put these parts of the electromagnetic spectrum in order from least amount of energy to most amount of energy.
gamma radio ultraviolet infrared

Explanation:

Step1: Recall the energy - wavelength relationship

The energy of a photon is given by \(E = h
u=\frac{hc}{\lambda}\), where \(h\) is Planck's constant, \(c\) is the speed of light, \(
u\) is the frequency and \(\lambda\) is the wavelength. Longer - wavelength radiation has lower energy.

Step2: Order the given parts of the electromagnetic spectrum by wavelength

The order of increasing energy (or decreasing wavelength) for the given parts of the electromagnetic spectrum:
Radio waves have the longest wavelength among the given options (\(\lambda_{radio}\gt\lambda_{infrared}\gt\lambda_{ultraviolet}\gt\lambda_{gamma}\)). Since \(E\propto\frac{1}{\lambda}\), the order of increasing energy is:
Radio (\(E_{radio}\)), Infrared (\(E_{infrared}\)), Ultraviolet (\(E_{ultraviolet}\)), Gamma (\(E_{gamma}\))

Answer:

radio, infrared, ultraviolet, gamma