A box resting on a flat surface contains a lamp. There is a small hole in the box. A light beam from the hole can be seen on the surface. Which color arrow correctly shows the direction of this light beam at the end of the surface?
The diagram shows how a protractor is used to measure the angles of incidence of two rays. Which color arrow shows the ray with the greater angle of incidence?
A mirror rests on a flat surface, seen from above. A light ray reflects from the face of the mirror. The mirror is then turned through an angle, keeping the point where the incident ray contacts the mirror the same. Which color arrow correctly shows the direction of the reflected ray after the mirror is turned?