General Physics

New kid on the Block

Joined: 1 Nov 2011
Post: 2
1 Nov 2011 20:08:12 IST
1 People liked this
2
477 View Post
rainbow
Engineering Entrance , Medical Entrance , NEET , JEE Main , AIIMS , JEE Main & Advanced , Physics

if we  observe rainbow from earth it is in the form of an arc.but if we observe it in aircraft it will be in circle. what is the reason behind this???



Comments (2)

Abhijeet Narang's Avatar

Cool goIITian

Joined: 7 Oct 2011
Posts: 93
5 Nov 2011 19:23:59 IST
1 people liked this

this is because in an aircraft (which is completely surrounded by earth's atmosphere ) total internal reflection takes place from water vapors which are present both above and below the aircraft so we are able to observe the circular rainbow but when we are on surface water vapors are present only above us so we observe a circular arc
Bipin Dubey's Avatar

Forum Expert
Joined: 23 Jan 2007
Posts: 7958
4 Mar 2012 14:15:28 IST
0 people liked this

It is a full circle, because the perfectly spherical water droplets in the air split the white sunlight into the spectrum which you see as a rainbow. The light comes in at an angle, and then reflects out at an angle. From your perspective on the ground, that angle exsists in a full 360 degree arc - a circle. You only see a semi-circle because either the earth gets in the way of seeing the rest, or because there isn't sufficient water suspended in the atmosphere to see the whole thing.



Quick Reply


Reply

Some HTML allowed.
Keep your comments above the belt or risk having them deleted.
Signup for a avatar to have your pictures show up by your comment
If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team
Free Sign Up!
Sponsored Ads

Preparing for JEE?

Kickstart your preparation with new improved study material - Books & Online Test Series for JEE 2014/ 2015


@ INR 5,443/-

For Quick Info

Name

Mobile

E-mail

City

Class

Vertical Limit

Top Contributors
All Time This Month Last Week
1. Bipin Dubey
Altitude - 16545 m
Post - 7958
2. Himanshu
Altitude - 10925 m
Post - 3836
3. Hari Shankar
Altitude - 10085 m
Post - 2217
4. edison
Altitude - 10825 m
Post - 7804
5. Sagar Saxena
Altitude - 8635 m
Post - 8064
6. Yagyadutt Mishr..
Altitude - 6330 m
Post - 1958

Find Posts by Topics

Physics

Topics

Mathematics

Chemistry

Biology

Parents Corner

Board

Fun Zone