Reflection Refraction diagnostic quiz Ans

Reflection & Refraction of Light Diagnostic Quiz 1 Name : _________________ ( ) Date : _________ 1. The diagram shows a ray of light being directed at a plane mirror. What are the angles of incidence and reflection? angle of incidence angle of reflection A 40o 40o B 40o 50o C 50o 40o D 50o 50o 2. What is the refractive index of a medium? A the ratio of the speed of light in air to the speed of light in the medium B the ratio of the speed of light in the medium to the speed of light in air C the ratio of the speed of light in the medium to the speed of light in vacuum D the ratio of the speed of light in vacuum to the speed of light in the medium 3. A light ray does not undergo refraction at a boundary between two media of different optical densities if its angle of incidence is _____ . A 0 B 45 C 90 D 180 4. The diagram shows a ray of light incident on the surface of a liquid and its subsequent path. The refractive index of the liquid is given by A   50sin 60sin B   50sin 30sin C   40sin 60sin D   60sin 40sin [ ] [ ] [ ] 10 13 1313 [ ]

Reflection & Refraction of Light Diagnostic Quiz 2 5. The figure below shows the path of a light ray from air into a glass block. (a) Calculate the refractive index, n, of the glass. n = …………………. [1] (b) Given that the speed of light in air is 3.0 × 10 8 m/s, calculate the speed of light, v, in glass. v = …………………….. [1] (c) State the value of angle y. y = …………………….. [1] 6. The figure below shows a ray of light entering at the face XY of a glass prism. The refractive index of the glass for this light is 1.49. (a) Calculate angle a. [1] (b) Calculate the critical angle for the glass. [1] (c) At face XZ, the angle of incidence b is 59. Sketch what happens to the ray of light at face XZ. [1]