Question

A travelling microscope is focussed on an jnk dot. When a glass slab (n = 1.5) of thickness 9 cm is introduced on the dot, the travelling microscope has to be moved by

• A. 3 cm upwards
• B. 5 cm upwards
• C. 3 cm downwards
• D. 5 cm downwards

Answer 1

Answer: (A)

3 cm upwards

Answer 2

The correct option is (A) : 3 cm upwards