Answer:
The correct answer is:
(a)
(b)
Step-by-step explanation:
The given values are:
Power of Laser beam,
= 10 mW
on converting it, we get
=
=
Spot's diameter,
= 0.62 μm
=
Now,
(a)
The intensity of light will be:
⇒
or,
⇒
On substituting the values, we get
⇒
⇒
(b)
The amplitude of electric field will be:
⇒
or,
⇒
On substituting the values, we get
⇒
⇒