{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

S10P1CLec22C

# S10P1CLec22C - Physics 1C Lecture 22C"If you want the...

This preview shows pages 1–6. Sign up to view the full content.

Physics 1C Lecture 22C "If you want the rainbow, you gotta put up with the rain." --Dolly Parton

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Dispersion The index of refraction in anything except a vacuum depends on the wavelength of the light. The dependence of n on λ is called dispersion. Snell’s Law indicates that the angle of refraction made when light enters a material depends on the wavelength of the light. The index of refraction for a material usually decreases with increasing wavelength.
Dispersion This means that violet light refracts more than red light when passing from air into a material. The amount the ray is bent away from its original direction is called the angle of deviation, δ . Since all the colors have different angles of deviation, they will spread out into a spectrum. Violet deviates the most. Red deviates the least.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Rainbows Rainbows appear when a ray of light strikes a drop of water in the atmosphere. The incident white light ray will undergo both reflection and refraction. At the first boundary (air- water), refraction will occur (with red deviating the least). At the second boundary (water-air), reflection will occur. It refracts again as it hits a third boundary (water-air).
Rainbows The angle between the incident white light and the violet ray is 40 o . The angle between the incident white light and the red ray is 42 o . All of the other visible colors will lie in between violet and red.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 21

S10P1CLec22C - Physics 1C Lecture 22C"If you want the...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online