# Homework Help: If light enters a new medium perpendicularly

1. Aug 11, 2005

### michaelw

How will it bend? Or will it not bend at all?

2. Aug 11, 2005

what would snell's law imply?

3. Aug 11, 2005

### michaelw

i dont know :/
lets say it goes from glass to air
1.5 = sin(theta)

but what does that say about theta?

4. Aug 12, 2005

### Lyuokdea

Hint, the correct equation for Snell's Law is:

$$n_{1} sin(\theta_1) = n_{2} sin(\theta_2)$$

Where $\theta_1$ and $\theta_2$ are the angle from the normal.

~Lyuokdea

5. Aug 12, 2005

### James R

michaelw:

Looks like you should have a sin(zero) factor in there.

6. Aug 12, 2005

### Galileo

From a physical point of view. If the medium is isotropic, why would the light bend in any particular preferred direction? Suppose it bend to the right from on standpoint. If you stand on the other side of the medium it would turn left while the physical situation is identical.