Which direction should you aim to shoot a fish using a laser gun

[songoku]

Homework Statement

To which direction should you aim your high - power laser gun to shoot a fish in a lake? (You stand on the edge of the lake)
a. the position where you see the fish
b. higher than the position where you see the fish
c. lower than the position where you see the fish
d. depends on the speed of the fish
e. can not be determined

Relevant Equations

Snell's law

If we use a spear or gun with bullet, then we should aim lower than the position where we see the fish because due to refraction, the apparent position of the fish in the lake will be higher (nearer to the surface) than the actual position of the fish.

But if we use a laser gun, I think we should aim to the position where we see the fish because the laser will also be refracted towards normal line when entering the water.

So the answer is (a)

Am I correct?

Thanks

 

[haruspex]

Homework Statement:: To which direction should you aim your high - power laser gun to shoot a fish in a lake? (You stand on the edge of the lake)
a. the position where you see the fish
b. higher than the position where you see the fish
c. lower than the position where you see the fish
d. depends on the speed of the fish
e. can not be determined
Relevant Equations:: Snell's law

If we use a spear or gun with bullet, then we should aim lower than the position where we see the fish because due to refraction, the apparent position of the fish in the lake will be higher (nearer to the surface) than the actual position of the fish.

But if we use a laser gun, I think we should aim to the position where we see the fish because the laser will also be refracted towards normal line when entering the water.

So the answer is (a)

Am I correct?

Thanks

Looks reasonable to me.

 

[songoku]

Thank you very much

 

[Delta2]

Your book has its funny aspects, using high power laser to shoot poor fishes lol.