Answer is:
tan(incidence angle) = 1/n21,?n21?= refractive index travelling from 2 to 1
Explanation:
the complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle.
Answer is:
least action
Explanation:
Optical fibre communication uses the principle of TIR
Answer is:
n1?=?n2r
Explanation:
For small angles Snell?s law becomes n1?=?n2r
Answer is:
1/v - 1/u= -1/f
Explanation:
Thin lens approximation for a lens is 1/v - 1/u= -1/f
Answer is:
5.7?10?3/N
Explanation:
Two insulated charged copper spheres A and B have their centres separated by a distance of 50 cm and have identical sizes. A third sphere of the same size but uncharged is brought in contact with the first, then brought in contact with the second, and finally removed from both. The new force of repulsion between A and B is? 5.7?10?3/N