OP - Bending and Reflecting Light - Week 2 Flashcards Preview

OD1 - Integrated Ophthalmic Sciences & Preclinical Optometry > OP - Bending and Reflecting Light - Week 2 > Flashcards

Flashcards in OP - Bending and Reflecting Light - Week 2 Deck (4)
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1
Q

Define Snells Law.

A

Path taken by light must have the least travel time.
Equation is:
n sin(i) = n’ sin(i’)

2
Q

What is a rule of thumb using Snells law and light angles?

A

If n’>n, then i’<i></i>

3
Q

What is the critical angle? Define the equation. When can this only occur?

A

Angle at which refracted angle is 90 degrees.
i = sin^-1(n’/n)
Only occurs when n’

4
Q

What happens to refraction if the angle is greater than the critical angle?

A

Light is internally refracted.

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