Assertion : In optical fibre, the diameter of the core is kept small.
Reeson : The smaller diameter of the core ensures that the fibres should have incident angle more than the critical angle required for total internal reflection.
The rays of all colours incident on a concave mirror at the same angle are reflected at the same angle. As there is no chromatic aberration, the reflected image is white.
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is not correct explanation of A
(c) A is true but R is false
(d) A and R are false
