Which order shows increasing energy of photons?
a. gamma rays, visible, infrared, microwaves
b. infrared, gamma rays, microwaves, visible
c. microwaves, infrared, visible, gamma rays
d. visible, microwaves, gamma rays, infrared

The correct answer is C. microwaves, infrared, visible, gamma rays

Electromagnetic waves arranged in order of  frequencies and wavelengths form the electromagnetic spectrum. In the order of decreasing frequency we obtain the following sequence.

Gamma ray>x-ray>ultraviolet >visible light>infrared light>microwaves>radio waves.

According to the Einsteins equation, E=hf, Energy is  directly proportional to frequency. the higher the frequency the higher the energy of the photon and vice-versa.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle