Question

2. A laser beam is coherent

because it contains
O
(c) coherent waves of several
wavelengths
o
(d) coherent waves of a single
wavelength
O (a) waves of several wavelengths.
o
(b) incoherent waves of a single
wavelength.​

Answer 1

Answer:

coherent waves of a single wave length

PLEASE BRAIN LIST MY ANSWER