Question

please give answer of above question​

Answer 1

Answer:

1.4D-6D=2D.

The position of the image is 2D.

2. The light travelling through air falls on the surface of a glass slab and emerges out of it parallel to the incident Ray .

angle of reflection in-glass r are an angle of emergence is e . and refractive index of glass in in terms of e and r is r and e