Physics
WAEC 2006
A travelling microscope is focused on a mark on a table. If a glass block of thickness 18.0cm is placed on the mark by how many centimeters will the microscope be moved upwards so as to focus the mark once again? [refractive index of glass = 1.5]
-
A.
27cm
-
B.
24cm
-
C.
9cm
-
D.
6cm
Correct Answer: Option D
Explanation
Apparent depth = \(\frac{\text{thickness}}{\text{refractive index}}\)
= \(\frac{18}{1.5} = 12cm\)
Upward adjustment = 18 - 12
= 6cm
Report an Error
Ask A Question
Download App
Quick Questions
Contributions ({{ comment_count }})
Please wait...
Modal title
Report
Block User
{{ feedback_modal_data.title }}