CBSE Class 10CBSE
Share
Notifications

View all notifications

Why Does the Sun Seem to Rise Two Minutes before the Actual Sunrise and Set Two Minutes After the Actual Sunset ? - CBSE Class 10 - Science

Login
Create free account


      Forgot password?

Question

Why does the sun seem to rise two minutes before the actual sunrise and set two minutes after the actual sunset ? Explain with the help of labelled diagram.

Solution

The Sun is visible to us two minutes before the sunrise and two minutes after the sunset because of the bending of the light due to atmospheric refraction. The actual sunrise takes place when the Sun is just above the horizon. But due to atmospheric refraction of light, we see the Sun about two minutes before it is actually above the horizon.

When the Sun is slightly below the horizon, its light moves from less dense air to more dense air and gets refracted towards the normal. Because of this atmospheric refraction, the Sun appears to be above the horizon when it is actually slightly below the horizon. It is also due to atmospheric refraction that we can still see the Sun for about two minutes even after it has set below the horizon.

  Is there an error in this question or solution?

APPEARS IN

Video TutorialsVIEW ALL [1]

Solution Why Does the Sun Seem to Rise Two Minutes before the Actual Sunrise and Set Two Minutes After the Actual Sunset ? Concept: Some Natural Phenomena Due to Sunlight.
S
View in app×