Question 14 - MCQs from NCERT Exemplar - Chapter 10 Class 10 - Light - Reflection and Refraction

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)