WAEC - Physics (1988 - No. 24)
A transparent rectangular block 5.0cm thick is placed on a black dot. The dot when viewed from above is seem 3.0cm from the top of the block calculate the refractive index of the material of the block.
2/5
3/5
3/2
5/3
5/2
Explication
refractive index = real depth ÷ apparent depth
→ 5 ÷ 3
n = 5/3