Answer:
Explanation:
The angle of incidence and refraction are both measured from the normal
angle of incidence = 30°
angle of refraction = 23°
refractive index(n) = sini / sinr
n = sin30°/sin23°
n = 1.27965
refractive index (n) = 1/sinC
where C is the critical angle.
sinC= 1/n
C =arcsin (1/n)
C =arcsin (1/1.27965)
C = 51.39°
The gravitational force of attraction between two objects would be increased by "decreasing the distance between two objects"
Hope this helps!
Potential energy = mgh
= 53.5 x 9.8 x 4.7
= 2464.21 Joules
Answer:A- Gamma rays
Explanation:
Gamma rays are most dangerous among all the given rays because it has the highest frequency i.e. high penetrating tendency. They can also pass through bones and teeth and this is the reason for their potential hazard.
They can destroy the living cell, initiate gene mutation and can cause cancer.
But they can also be used for destroying cancer cells.
