Sec 1 Science Ray Model of Light topical questions

State the law of reflection in words, and say which line the angles are measured from.

State three properties of the image in a plane mirror.

Give one use of a convex mirror and one use of a concave mirror.

State what refraction is.

State one benefit and one harm of bright outdoor lighting at night.

A ray hits a plane mirror. The angle between the ray and the mirror is 35°.

1. (a)Calculate the angle of incidence.[1]
2. (b)State the angle of reflection.[1]
3. (c)Explain why the answer is not 35°.[2]

Explain the difference between regular and diffuse reflection, and why a white wall can be seen but not used as a bathroom mirror.

A straw looks bent where it enters water. Explain this using the ray model. No angle calculation is needed.

Describe what a prism does to white light, and state which colour bends the most.

An object is 8 cm in front of a plane mirror. State the image distance and whether the image is real or virtual. Explain the word you choose.

A student says, “The angle of reflection is equal to the angle of incidence, so it does not matter whether I measure from the mirror or from the normal.” Explain why that short cut fails.

A security mirror in a shop is convex. A torch reflector is concave. Explain why swapping them would make each job worse.

Light goes from air into a glass block along the normal, and later a second ray hits the same block at an angle. Compare what happens to the two rays.

A city adds bright white lamps “for safety”. Suggest one benefit, one environmental cost, and one change that keeps some of the benefit while reducing the cost.

Explain why the ray model is useful for designing a periscope, and state one thing the model does not show.