# Physics

posted by .

for our lab, we had to fill a semi-circle plastic dish (with a scratch on one side) with water and find the index of refraction of water by putting a pin on one side of the dish, looking through the water, and put a pin on the other side of the dish to line up with the first pin and the scratch. we then found the angles of incidence and refraction. but the light goes from air to plastic to water. does the plastic pose a problem since it has its own index of refraction?

In going through the plastic side wall of the dish, a light ray will be displaced a small amount (comparable to the thickness of the wall) but will not change its direction. The plastic will not have a significant effect on the measurement.

## Similar Questions

1. ### chem

confused about this one. 2 samples of water of equal volume are put into dishes and kept at room temp for several days. the water in the first dish is completely vaporized after 2.8 days while the water in the second dish takes 8.3 …
2. ### Physics

In this lab we did, we measured the angles of light that came through a piece of this special plastic. We had to find out the index of refraction for each of the angles of incidence in two different cases. The question asks "Is there …
3. ### math

Ted is hosting a dinner party. He has a the choice of serving chicken, pasta, or hamburgers for the main course;carrots, lettuce salad, or pineapple for the side dish; and ice cream or cookies for dessert. How many combinations of …
4. ### math

Ted is hosting a dinner party. He has a the choice of serving chicken, pasta, or hamburgers for the main course;carrots, lettuce salad, or pineapple for the side dish; and ice cream or cookies for dessert. How many combinations of …
5. ### Physics

We were doing a refraction lab where you passed a lazer beam through a water in a semi-circular dish. I was wondering why we used a semi-circular shape?

A satellite dish is designed to pick up radio waves from geostationary satellites about 36000 km about the Earth's surface. If the dish's surface is a part of a sphere of radius R, where should the receiver be placed compared to the …
7. ### physics

A cylindrical glass of radius r=3 cm is full of salt water of height h=10 cm with the water's refraction index changing linearly from the bottom n1=1.401 to the top n2=1.400. A flashlight is positioned so that light shines horizontally …
8. ### math

If a sandwich shop sells lunches that include one sandwich and one side dish, draw a tree diagram to represent the number of combinations that are possible if the choices are a ham or turkey sandwich and chips or cookies as the side …
9. ### chemistry

You weigh an empty dish and find its mass to be 48.0 grams. After you add a volume of salt water to the dish the mass of the dish and salt water is now 74.0 grams. After 100% of the water has been evaporated, the mass of the dish and …
10. ### Physics 30

inquiry lab determining the refractive index of a variety of materials (Snell's Law Lab): Basically this lab: We us a polar coordinate paper and a semicircular shaped containers which we switch between, which are composed of different …

More Similar Questions