Lesson: Chapter - 18

Key Formulas

Frequency of an Electromagnetic Wave

Law of Reflection

?incidence = ?reflection

Index of Refraction

n = c/v

Snell’s Law

n1sin?1 = n2sin?2

Critical Angle

?c = arcsin n2/n1

Focal Length for a Spherical Concave Mirror

ƒ = R/2

Mirror and Lens Equation

Magnification

Maxima for Single Slit Diffraction

d sin? = (n + 1/2)?, where n is an integer

Minima for Single Slit Diffraction

d sin? = n?, where n is an integer

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