If ice has a density of.92g/cm, what is the volume of 1.8 kilograms of ice?
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The frequency of the re-emitted light is identical to that of the absorbed light.
To find the answer, we need to know more about the frequency of light.
<h3> Why the re-emitted light has the same frequency?</h3>- The wavelength of the light that is momentarily absorbed in glass and then re-emitted is the same, which explains why the re-emitted light has the same frequency as the absorbed light and the frequency of the absorbed light is the same.
- An electromagnetic wave's energy is inversely related to its frequency.
- The relationship between the wave's wavelength and frequency depends on the speed of light:
, c is the speed of light.
- Despite not having mass, light still has energy, and that energy is conserved.
- As a result, in order for there to be energy conservation, the energy of the light that is received and reemitted must be equal.
Thus, we can conclude that, the re-emitted light's frequency matches the absorbed light's frequency.
Learn more about frequency here:
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a) The speed of the wave will increase by a factor .
b) The speed of the wave will halve
c) The speed of the wave will double
Explanation:
a)
The speed of a standing wave on a string is given by
where
T is the tension in the string
m is the mass of the string
L is the length of the string
In this part of the problem, the tension in the string is doubled, so that the new tension is
T' = 2T
Substituting into the equation, we find the new speed of the wave in the string:
So, the speed will increase by a factor .
b)
We can solve also this part by referring to the formula
where
T is the tension
m is the mass
L is the length
In this case, the string mass is quadrupled, so the new mass is:
m' = 4m
Substituting into the equation, we find what happens to the speed of the wave:
So, the speed of the wave will halve.
c)
Again, we can solve this part by referring to the same equation
where
T is the tension
m is the mass
L is the length
In this case, the length of the string is quadrupled, so the new length is:
L' = 4L
Substituting into the equation, we find that the new speed is:
So, the speed of the wave will double.
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