Answer:
45.93°
Explanation:
The angle of incidence is given as 32.7°
The refractive index of the water that is
Refractive index of the air that is (because the refractive index of air is 1 )
We have to find the angle at which the light leave the water means angle of refraction
So according to snell's law
r =45.93°
So the light leave the water at an angle of 45.93°
Answer:
The person with locked legs will experience greater impact force.
Explanation:
Let the two persons be of nearly equal mass (say m)
The final velocity of an object (person) dropped from a height H (here 2 meters) is given by,
( = acceleration due to gravity)
which can be derived from Newton's equation of motion,
Now, the time taken (say ) for the momentum (
) to change to zero will be more in the case of the person who bends his legs on impact than who keeps his legs locked.
We know that,
Naturally, the person who bends his legs will experience lesser force since is larger.