# What is the angle of refraction if a ray of light passes from water into air at an angle of 30 degrees?

##### 1 Answer

One problem solving strategy that I find very useful in answering a question like this is GRASS.

<b>G - what am I Given? </b> Assign each value to a number.

<b>R - what am i Required to find? </b> This is my unknown (

<b>A - what formula do I need to use? Do I need to manipulate the equation to isolate my unknown value?</b>

To answer a question like this, use Snell's Law (

<b>S - Solve.</b>

<b>S - Significant digits. </b>

Since