3.1 – Calculations of Refraction of Light (Leaving Cert Physics): Flashcards

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3.1 – Calculations of Refraction of Light
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Refraction

Light changing direction when passing between materials

Snell's Law formula

n=sin⁡isin⁡rn = \frac{\sin i}{\sin r}

nn in Snell's Law

Refractive index of the material

ii in Snell's Law

Angle of incidence (measured from normal)

rr in Snell's Law

Angle of refraction (measured from normal)

Normal in refraction

Line perpendicular to surface at point light enters

Value of sin⁡isin⁡r\frac{\sin i}{\sin r}

Constant for a material; equals refractive index

Slope of sin⁡i\sin i vs sin⁡r\sin r graph

Refractive index of the glass block

Where sin⁡i\sin i vs sin⁡r\sin r graph passes

Through the origin

Refractive index for air to denser material

Always greater than 1

Parallax error in refraction experiment

Error when reading angles on protractor

Why keep incident/emergent marks far apart

Improves accuracy and reduces percentage errors

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