Answer:
Number of photons travel through pin hole=
Explanation:
First we will calculate the energy of single photon using below formula:

Where :
h is plank's constant with value 
c is the speed of light whch is
λ is the wave length = 532nm

E=
J
Number of photons emitted per second:

Number of photons emitted per second=
=
Where:
A-hole is area of hole
A-beam is area of beam
d-hole is diameter of hole
d-beam is diameter if beam
=
=
=
Number of photons travel through pin hole=
Number of photons travel through pin hole=
The answer should be false because it doesnt say if the car is traveling at constant speed. The cars speed can be various so that in total for 2 hours that it travels it passes 80 miles. If however it actually traveled at constant speed than the answer is true.
Answer:
Energy of UV light 
Energy of green light 
Energy of infrared light 
Explanation:
We have given the wavelength of UV light = 400 nm
, wavelength of green light = 550 nm and wavelength of infrared = 900 nm
Speed of light 
Plank's constant 
Energy of the signal is given by 
So energy of UV light 
Energy of green light 
Energy of infrared light 