Answer:
Refraction
Explanation:
Refraction is a phenomenon typical of light waves. It occurs when a ray of light passes through the interface between two mediums: when doing so, the ray of light changes speed and also changes direction, according to Snell's Law:
where
are the index of refraction of the first and second medium, respectively
are the angle of incidence and refraction, respectively
When white light enters a prism, therefore, it undergoes refraction, and it changes direction.
However, the index of refraction of a material, n, depends also on the wavelength of the light. In particular, the shorter the wavelength, the higher the index of refraction.
This means that as white light enters a prism, the different wavelengths contained in the white light are refracted at different angles: as a result, the 7 colors of light will separate, and that is why we observe the rainbow when white light enters a prism.
Answer:
4.9 kg.m/s.
Explanation:
Given that
mass ,m = 0.7 kg
Initial speed , u = 5 m/s ( Towards + x direction)
Final speed ,v= -2 m/s ( Towards - x direction)
We know that linear momentum is given as
P = Mass x velocity
Change in the linear momentum ΔP will be
ΔP = m ( v - u)
Now by putting the values in the above equation ,we get'
ΔP= 0.7 ( -2 - 5 ) kg.m/s
ΔP= - 4.9 kg.m/s
The magnitude of the change in the linear momentum will be 4.9 kg.m/s.
Answer:
3+2i ohm.
Explanation:
Here we have a complex number operation. According to Ohm's law V=I*R, so:
we need to remove the complex number on the denominator, so we have to multiply by its complement on both side
that gives us:
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