a ray of light goes from one transparent material into another, as shown in the figure. what can you conclude about the indices of refraction of these two materials?

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.