The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in Figure 10.5. Which one of them is correct?
(a) A
(b) B
(c) C
(d) D
Answer
Refraction of light through a glass slab takes place as shown in the figure:
Now, let’s check all 4 options -
-
For A
- Light doesn’t bend when light passes from air to glass, and it also doesn’t bend when light passes from glass to air. So, A is
not true
-
For B
- Light bends towards the normal when light passes from air to glass, and it bends away from normal when light passes from glass to air. So, B
is the correct answer
-
For C
- Light doesn’t bend when light passes from air to glass. So, C is
not true
- For D - Light bends towards the normal when light passes from air to glass but it doesn’t bend when light passes from glass to air. So, D is not true
So, the correct
answer is (b)
