How does LASER light differ from ordinary white light?
I. Laser light is hotter than white light.
II. Laser light's waves are in phase.
III. Laser light contains only one wavelength.
IV. Laser light is always red in color.
A) II only
B) I and II
C) II and III
D) I, II, and III
E) II, III, and IV

Question

Quizplus · Accepted Answer

Laser light's waves are in phase and contain only one wavelength, making it different from ordinary white light. Laser light is not necessarily hotter than white light, and it can be of various colors, not just red. Therefore, options I and IV are incorrect, and option D includes an incorrect statement. Option C correctly identifies the two main differences between laser light and ordinary white light.

How Does LASER Light Differ from Ordinary White Light