Consider a ray at the interface air and glass

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SUMMARY

The discussion focuses on the relationship between the incident angle (i) and the refracted angle (r) at the air-glass interface, governed by Snell's Law, where the refractive index of glass is 1.5. The relationship is expressed as sin i = 1.5 sin r, leading to a linear approximation r = 0.6 i + 1 based on provided data points. The angles are analyzed in degrees, with the refracted angles calculated for incident angles ranging from 10° to 50°. The discussion also emphasizes the need to express r as a function of i using Snell's Law and to develop the sine and arcsine functions accordingly.

PREREQUISITES
  • Understanding of Snell's Law and refractive indices
  • Basic knowledge of trigonometric functions, particularly sine and arcsine
  • Familiarity with angle measurements in degrees and radians
  • Ability to interpret and analyze linear equations
NEXT STEPS
  • Explore the derivation of Snell's Law in different media
  • Study the properties and applications of the sine and arcsine functions
  • Investigate the implications of refractive indices on light behavior
  • Learn about graphical representations of linear relationships in physics
USEFUL FOR

Physics students, optical engineers, and anyone interested in the principles of light refraction and trigonometric relationships in optics.

Gamma
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Consider a ray at the interface air and glass (n = 1.5). We know that incident angle i and refracted angle r are related by sin i = 1.5 sin r

Can we some how show the relationship between i and r is r = m i + c (straight line)?

If you look at the following data, it follows the Snell's law and r = 0.6 i + 1.

i r
10 7
20 13
30 19
40 25
50 31
 
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Gamma said:
Consider a ray at the interface air and glass (n = 1.5). We know that incident angle i and refracted angle r are related by sin i = 1.5 sin r

Can we some how show the relationship between i and r is r = m i + c (straight line)?

If you look at the following data, it follows the Snell's law and r = 0.6 i + 1.

i r
10 7
20 13
30 19
40 25
50 31

Hoping this is not an homework, write r as function of i using Snell's law, then develop the functions sin and arcsin to the appropriate order (in radians), considering that 50° are less than 1 radian.
 

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