Explanation:
The velocity of light in a medium of refractive index
The exact value of speed of light in vacuum is .
For Cherenkov radiation to be emitted, the velocity of the charged particle traversing the medium must be greater than this velocity. Thus, the threshold velocity of for creating Cherenkov radiation is,
For water
For ethanol
Answer:
A velocity of
Explanation:
Since the magnitude of the vector is equal to the magnitude of velocity, velocity of the 2 cm vector represents a velocity of $10\times 2= 20 \: km/h$.
Answer:
The interference pattern from a diffraction grating will have a wide, central bright band with alternate dark and bright bands on both sides, and the interference pattern will have an equally spaced dark and bright band.
Explanation:
In diffraction pattern we know that the distance between two consecutive minimum position is maximum
So here position of minimum is given as
now we have central maximum is of maximum width while all other have width of decreasing order.
While when we use Young's double slit pattern then we can say that position of all maximum and minimum intensity on the screen will be at same distance.
so here we have
so all the maximum and minimum intensity will have equal width.
Answer: F
Explanation: The boy is controlling the bowling ball therefore he can use greater force