What type of specialized cell in the eye is used for detecting low levels of light?
2 answers:
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Answer
given,
mass of an object = 5 Kg
mass of the other object = 5.98 x 10²⁴ Kg
radius of earth = 6371 Km = 6.371 x 10⁶ m
comparison between gravitational force between two object and weight of the object.
gravitational force between two objects
F = 49.134 N
weight of the object on the earth surface
F = m g
F = 5 x 9.81
F = 49.05 N
From the above two calculation we can conclude that gravitational force is approximately equal to weight of the body.
To solve this problem we will apply the concepts related to Frequency (Reverse to Period) and the description of the wavelength as a function of the speed of light at the rate of frequency.
Our Laser frequency is given as
Therefore the laser wavelength would be
Where,
c = Speed of light
f = Frequency
The laser pulse is emitted at a period (T) of
Therefore the pulse wavelength would be
Finally the number of wavelengths is the ratio between the two wavelengths, then
The number of wavelengths in the beam length is closer to