4. In the diagram below, you will see three materials. Each has its index of refraction given. (8 points) air=n1
glass=n1.5
water=n1.33

A. On the diagram above, trace the path of a light ray through these materials. (4 points)

i. From air into glass

ii. From glass into water

B. Justify your choice of path in words. (4 points)

i. From air into glass

ii. From glass into water

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Where do magnetic lines of force enter earth?