Question: If the transparent liquid in the cup is completely replaced with an equal volume of glycerol, from the current viewing angle, how will the apparent depth of the tip of the red long rod submerged in the liquid change?
A. It will appear deeper.
B. It will appear shallower.
C. The apparent depth will remain unchanged.
D. The rod’s physical position will change due to buoyancy, causing a change in apparent depth.
Clues:
1. A transparent glass is on a table.
2. The glass is partially filled with a clear, transparent liquid.
3. A long, straight, red rod is inserted into the glass at an angle.
4. The part of the rod submerged in the liquid appears to be bent upwards relative to the part of the rod in the air.
5. The apparent angle of the submerged part of the rod is less steep than the part above the water. This makes the submerged part look shallower than it would if it were a straight line.
6. The background includes a TV stand with panda decorations and a light blue appliance. These are irrelevant to the physics problem but are part of the visual scene. The key observation is the "broken" appearance of the rod.
7. There is a transparent glass containing a clear liquid.
8. A straight red rod is placed in the glass, partially submerged in the liquid.
9. The rod appears bent at the interface between the air and the liquid.
10. The submerged portion of the rod appears to be at a shallower angle than the portion above the liquid.

Answer: B
Category: Physics