Answer:So the answer is B
Explanation: When the light rays either bend or change their direction while passing from one medium to another it is called refraction of light. The refraction of light takes place when light travels from air into glass, from glass into air, from air into water or from water into air.
Answer:
Explanation:
Given
side of square shape 
Electric flux 
Permittivity of free space 
Flux is given by

where E=electric field strength
A=area
=Angle between Electric field and area vector



and Electric field by a uniformly charged sheet is given by

where
=charge density


Explanation:
I believe part of the question is missing. can you please check on it?
is there a part where the mass of the object is mentioned?
A. The amount of water. 50/50