Question

A microscope is focused on a mark, then a glass slab of refractive index 1.5 and thickness of 6 cm is placed on the mark to get the mark again in focus, the microscope should be moved
(1) 4cm
(2) 2 cm
(3) 6 cm
(4) 8 cm​

Answer 1

Answer:

A microscope is focused on a mark, then a glass slab of refractive index 1.5 and thickness of 6 cm is placed on the mark to get the mark again in focus, the microscope should be moved

(1) 4cm

Answer 2

Shifting in microscope = upward shifting in mark

=

t

(1−

μ

1

)

=

3

(1−

1.5

1

)

= 1 cm