Question: Keeping the observation position and the way you move the tool unchanged, replace the transparent liquid in the cup with a liquid of higher refractive index (all other conditions the same). To make a straight rod inserted from air accurately touch a small target on the bottom of the cup, compared with your original method, how should you adjust the amount of vertical correction?
A. Decrease the downward correction
B. Switch to an upward correction
C. Increase the downward correction
D. No correction needed
Clues:
1. A straight, dark-colored rod is placed in a clear glass filled with a transparent liquid.
2. The rod enters the liquid at an angle.
3. The part of the rod that is submerged in the liquid appears bent upwards relative to the part that is in the air.
4. The submerged part of the rod appears to be at a shallower depth than a straight continuation of the part in the air would suggest.
Answer: C
Category: Physics