According to the law of reflection- (a) i/r= constant
(b) Sin i / Sin r = constant
(c) i = 1
(d) i + r = constant​

b is correct answer

thank you

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

no

sodium is solid at rt