Answer:
Period of the waves = 0.00013 s (Approx.)
Explanation:
Given:
Propagation speed = 150 m / s
Wavelength = 0.02 m
Find:
Period of the waves
Computation:
Period of the waves = Wavelength / Propagation speed
Period of the waves = 0.02 / 150
Period of the waves = 0.00013 s (Approx.)
Definitely belongs to the fungi kingdom!
did you hear the joke about the fungus???
... I could tell you, but it'd take some time to grow on ya!
goodluck my friend, :-)
Answer:
Thus, the minimum number of photons per second is 77.34
Explanation:
Light intensity,
= 
Pupil has a diameter, d = 8.5 mm
= 8.5 x
m
Radius of the eye, r = 4.25 x
m
∴ Area of the eye, A = 
= 
= 
Let
be the minimum number of photons.
Therefore,
=
x A
=
x 
=
W
Thus the minimum number of photons is given by

where E = 
= 
= 
Therefore,
= 
= 77.34 photons per second
Thus, the minimum number of photons per second is 77.34