What are the properties of your favorite dessert gelatin

1
What are the properties of your favorite dessert
gelatin?
1. 2. 3. 4. 5. 6. 7.
2
gelatin reference line
normal
T
red gelatin
3
laser pointer
incident ray
incident angle
T
refracted angle
refracted ray
4
Trial 1
T
5
Trial 2
T
6
Trial 3
T
7
T
8
Measure the incident angle.
T
protractor
9
Measure the refracted angle.
T
protractor
10
x, y
y
x
?
T
y
opposite side hypotenuse
sin(?)

?x2 y2