So i am doing a physics lab about the expansion of water. esentially i have a cork on a glass bottle filled with water. in two holes in the cork i have a pippette and then a go temperature probe to measure the temperature. the water is displaced into the pippette so i can measure the volume of expansion when the water heats up and cools. i first have to cool the water to 0 degrees and then have it in a room temperature room and record every mm expalnsion and the corresponding increase in temperature until 15 degrees. other than not accounting for the increase of expansion of the glass bottle, what other sources of error could there be for this experiment?

1.   what is light?

light is an electromagnetic wave visible to the human eye. 

2. what is a reflection?

the rebounding of a light ray when it hits a mirror.

3. what is the incident ray?

contacts the surface of an object.

4. what is the reflected ray?

bounces off a reflective surface.

5. what is the normal ray?

perpendicular to the surface of a mirror.

6. what is the angle of incidence?

an angle formed by the incident ray and the normal.

7. what is the angle of reflection?

an angle formed by the reflected ray and the normal.

8. what is refraction?

(bending.)

9. what is a converging lens?

bring together light rays that pass through.

10. what is a diverging lens?

spreads out light passing through.

11. focal point?

the real point where the refracted rays meet when the incident rays run parallel.

i copy pasted btw from an website..