Answer:
★The second law of refraction
The ratio of sine of angle of incidence to the sine of angle of refraction is a constant for a light of given colour and for a given pair of media. This law is also called Snell's law of refraction. If 'i' is the angle of incidence and 'r' is the angle of refraction then, Sin i/Sin r = constant
This constant value is called the refractive index of the second medium with respect to the first.
as it is given that curved marked the speed as v = 70 km/h
so we will first convert the speed into m/s
now we know that here friction force will provide centripetal force
As we know that centripetal force is given as
F=ma=kg*m/s^2=N
Work=W=Force*d=N*m
P=W/time=N*m/s=kg*m^2/s^3=kg*m^2*s^-3=Watt
So 1 Watt of Power is equivalent to (kg*m^2)/s^3 or kg*m^2*s^-3
Any questions please feel free to ask. Thank you
The question is fishing for "polarization", but the description is all wrong.
Polarization doesn't do anything to the light waves.
It simply blocks any light waves that are not vibrating in
the desired plane, and lets the leftovers pass through.
If there are no light waves already vibrating in the desired plane
in the light that enters the polarizer, then NO LIGHT comes out of it.
If you line up two polarizers and rotate them so that their desired
planes are crossed, then regardless of what goes into the first one,
NO light comes out of the second one !
