Is rainbow a prismatic spectrum or grating spectrum ?

  • Thread starter mkbh_10
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Main Question or Discussion Point

Is rainbow a prismatic spectrum or grating spectrum ?


I think it is a grating spectrum as

Deviation Order(violet least and red most) is same as that of grating
Source is at infinity (sun)
Image is at infinity
 

Answers and Replies

pam
455
1
A rainbow is not a grating spectrum.
It is caused by refraction as the light passes in and then back out of each drop of water.
 

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