Assertion(A) : A ray of light travelling from a rarer medium to a denser medium slows down and bends away from the normal. When it travels from a denser medium to a rarer medium, it speeds up and bends towards the normal. Reason (R) : The speed of light is higher in a rarer medium than a denser medium.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true
Answers
Answer:
Assertion(A) : A ray of light travelling from a rarer medium to a denser medium slows down and bends away from the normal. When it travels from a denser medium to a rarer medium, it speeds up and bends towards the normal. Reason (R) : The speed of light is higher in a rarer medium than a denser medium.
Answer:
A is false but R is true
Explanation:
Refraction: It is the phenomenon in which a ray of light passes from one medium to the another and in this course it is refracted from its path. When a ray of light travels from a rarer medium to a denser medium, it slows down and bends towards the normal. While a ray of light passing from the denser medium to the rarer medium, moves away from the normal.
Light ray moving in a rarer medium is obstructed less than when it travels in denser medium. Therefore, speed of light is more in rarer medium.
So, A is false but R is true.