- #1
lecker1003
- 6
- 0
hi, i got a real problem. i have a question here and have absolut no clue what i have to do and which equation i have to use...
( for my shame, i was sick at that time we done it in school..)
question:
A diver is at the bottom of a lake, which is 10m deep. if he looks straight up he sees the sky, but if he looks at the surface of the water a little further away he sees a reflection of the lake-bed in the calm surface. calculate the distance from his position to the nearest point on the bed that he can see clearly in the reflection. take the refraktive index of the water as 1.33, and of the air as 1.
i really was thinking about it, but i have no clue what i have to do...
( for my shame, i was sick at that time we done it in school..)
question:
A diver is at the bottom of a lake, which is 10m deep. if he looks straight up he sees the sky, but if he looks at the surface of the water a little further away he sees a reflection of the lake-bed in the calm surface. calculate the distance from his position to the nearest point on the bed that he can see clearly in the reflection. take the refraktive index of the water as 1.33, and of the air as 1.
i really was thinking about it, but i have no clue what i have to do...