Правка разделов «Statement», «Answer»
en/13.2.3.md
+2 −2
| @@ -1,6 +1,6 @@ | |||
| ### Statement | |||
| − | $13.2.3.$ [Insert the problem statement] | ||
| + | $13.2.3.$ A snail sits on the far wall of a rectangular aquarium of width $l$. By what factor will the apparent angular size of the snail change if the water is drained from the aquarium? The observer is located at a distance $L$ from the aquarium. | ||
| ### Solution | |||
| In the previous problem we proved that the apparent width of the aquarium will be $n$ times smaller than the real one. The angular size at large distances is inversely proportional to the distance $\to$ | |||
| $$\alpha' = \alpha \frac{L+\frac{l}{n}}{L+l}$$ | |||
| @@ -10,4 +10,4 @@Solution | |||
| #### Answer | |||
| − | [Insert a concise answer or boxed result] | ||
| + | $$\alpha' = \alpha \frac{L+\frac{l}{n}}{L+l}$$ | ||
| @@ -1,6 +1,6 @@ | |||
| ### Statement | ### Statement | ||
| $13.2.3.$ [Insert the problem statement] | $13.2.3.$ A snail sits on the far wall of a rectangular aquarium of width $l$. By what factor will the apparent angular size of the snail change if the water is drained from the aquarium? The observer is located at a distance $L$ from the aquarium. | ||
| ### Solution | ### Solution | ||
| In the previous problem we proved that the apparent width of the aquarium will be $n$ times smaller than the real one. The angular size at large distances is inversely proportional to the distance $\to$ | In the previous problem we proved that the apparent width of the aquarium will be $n$ times smaller than the real one. The angular size at large distances is inversely proportional to the distance $\to$ | ||
| $$\alpha' = \alpha \frac{L+\frac{l}{n}}{L+l}$$ | $$\alpha' = \alpha \frac{L+\frac{l}{n}}{L+l}$$ | ||
| @@ -10,4 +10,4 @@Solution | |||
| #### Answer | #### Answer | ||
| [Insert a concise answer or boxed result] | $$\alpha' = \alpha \frac{L+\frac{l}{n}}{L+l}$$ | ||