Question 27
Refraction of LightA trough 12.0 cm deep is filled with water of refractive index 4/3. By how much would a coin at the bottom of the trough appear to be displaced when viewed vertically from above the water surface?
- A.3.0 cm
- B.6.0 cm
- C.9.0 cm
- D.16.0 cm
Show the answer and explanation
Answer: A (3.0 cm)
Explanation
Apparent depth = 12 ÷ (4/3) = 9 cm, so the coin seems raised by 12 − 9 = 3 cm.