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en/13.4.20.md
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| − | ### Statement | ||
| − | |||
| − | $13.4.20.$ [Insert the problem statement] | ||
| − | |||
| − | ### Solution | ||
| − | |||
| ### Problem | |||
| $13.4.20.$ Why are bright stars visible through a telescope even during the day? | |||
| ### Solution | |||
| A telescope has a much larger aperture than the human pupil, so it collects significantly more photons from a star. Additionally, when looking through a telescope, we observe a narrow section of the sky, where less scattered light enters the eye. This reduces the background brightness and increases the contrast between the star and the sky. | |||
| @@ -15,7 +9,3 @@Solution | |||
| #### Answer | |||
| The light flux from the star to the eye increases sharply. | |||
| − | |||
| − | #### Answer | ||
| − | |||
| − | [Insert a concise answer or boxed result] | ||
| @@ -1,9 +1,3 @@ | |||
| ### Statement | |||
| $13.4.20.$ [Insert the problem statement] | |||
| ### Solution | |||
| ### Problem | ### Problem | ||
| $13.4.20.$ Why are bright stars visible through a telescope even during the day? | $13.4.20.$ Why are bright stars visible through a telescope even during the day? | ||
| ### Solution | ### Solution | ||
| A telescope has a much larger aperture than the human pupil, so it collects significantly more photons from a star. Additionally, when looking through a telescope, we observe a narrow section of the sky, where less scattered light enters the eye. This reduces the background brightness and increases the contrast between the star and the sky. | A telescope has a much larger aperture than the human pupil, so it collects significantly more photons from a star. Additionally, when looking through a telescope, we observe a narrow section of the sky, where less scattered light enters the eye. This reduces the background brightness and increases the contrast between the star and the sky. | ||
| @@ -15,7 +9,3 @@Solution | |||
| #### Answer | #### Answer | ||
| The light flux from the star to the eye increases sharply. | The light flux from the star to the eye increases sharply. | ||
| #### Answer | |||
| [Insert a concise answer or boxed result] | |||