Relate speed, velocity, and acceleration to objects in motion.
1 answer:
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The speed of light in that medium is .
<u>Explanation:</u>
It is known that the light's speed is constant when it travels in vacuum and the value is . When the light enters another medium other than vacuum, its speed get decreased as the light gets refracted by an angle.
The amount of refraction can be determined by the index of refraction or refractive index of the medium. The refraction index is measured as the ratios of speed of light in vacuum to that in the medium. It is represented as η =
So, here η is the index of refraction of a medium which is given as 1.4, c is the light's speed in vacuum () and v is the light's speed in that medium which we need to find.
Thus the speed of light in that medium is
Answer:
Explanation:
First let us write out the formula connecting the simple parameters in a system of simple pendulum
Where
T= period of oscillation,
L=length of the pendulum
g= acceleration due to gravity
from the above formula, it is obvious that Mass has no effect on the period(T).
Again let see the relationship that exist between the period(T) and the length(L).
let assume , then we can have
We can conclude that the period is directly proportional to the square-root of the length.
we can vary the constant K to have
Now back to the question, if the length was doubled, we have the
using the varying equation, we can substitute values and arrive at
carrying out simple operation, we arrive at
Finally we have
hence we can conclude that the When the length is doubled, the period is increase by a factor of root 2