Light

9.Match each term with its correct description.

10.Name one practical application of total internal reflection.

11.In a ray diagram for reflection, what does the normal line represent?

12.A ray of light strikes a plane mirror at an angle of incidence of 40°. What is the angle of reflection? (Give your answer in degrees.)

13.The law of reflection states that the angle of incidence is equal to the angle of reflection.

14.What is the name of the imaginary line drawn at right angles to the boundary between two media?

15.Which of the following is a property of the image formed in a plane mirror?

16.When light travels from a less dense medium to a denser medium, it bends away from the normal.

17.What is the critical angle defined as?

18.Which of the following is a use of total internal reflection?

19.A real image can be projected onto a screen.

20.Which colour of light has the longest wavelength in the visible spectrum?

21.A ray of light passes from air into a glass block. The refractive index of glass is 1.5. If the angle of incidence is 30°, what is the angle of refraction? (sin30° = 0.5, sin19.5° = 0.333)

22.Arrange the colours of the visible spectrum in order of increasing wavelength (shortest to longest).

23.Which of the following are properties of the image formed by a plane mirror? (Select all that apply)

24.When light travels from air into glass, it bends away from the normal.

25.A ray of light passes from a liquid into air. The refractive index of the liquid is 1.47. The angle of incidence in the liquid is 35°. What is the angle of refraction in air? (sin 35° = 0.574)

26.An object is placed beyond 2F from a converging lens. What type of image is formed?

27.Using the diagram, calculate the refractive index of the glass. (sin 30° = 0.500, sin 20° = 0.342)

28.White light is passed through a glass prism. Which colour is refracted the most?

29.A student investigates reflection using a plane mirror. The angle of incidence is measured as 30°. What should the angle of reflection be according to the law of reflection?

30.A ray of light passes from glass into air. The critical angle for the glass-air boundary is 42°. What happens when the angle of incidence in the glass is 50°?

31.A converging lens has a focal length of 10 cm. An object is placed 25 cm from the lens. Which of the following best describes the image formed?

32.In an experiment to verify the law of reflection using a ray box and a plane mirror, which of the following is the most important control variable?

33.Which of the following is a practical difficulty when using the pin method to determine the refractive index of a transparent block?

34.A student obtains two values for the refractive index of a glass block: 1.49 and 1.55. Which of the following is the most likely reason for the difference?

35.In the pin method for determining refractive index, the pins should be placed as close together as possible to improve accuracy.

36.Match each experimental term with its correct description.

37.Arrange the following steps in the correct order for determining the refractive index of a glass block using the pin method.

38.Which of the following are possible sources of error when using the pin method to measure refractive index? (Select all that apply)

39.In the dispersion of white light by a prism, which colour is refracted the least?

40.In a plane mirror, the image is the same size as the object.

41.What is the name of the line drawn at right angles to the boundary between two media in optics?

42.Which of the following is a property of the image formed by a plane mirror?

43.Total internal reflection can only occur when light travels from a denser medium to a less dense medium.

44.An object is placed at a distance greater than 2F from a converging lens. Which of the following describes the image formed?

45.Arrange the following colours in order of increasing wavelength (shortest to longest).

46.Complete the sentence about dispersion.

47.Fill in the blank: In a converging lens, rays of light that are parallel to the principal axis are refracted to pass through the ___.

48.Light travels from air into a diamond. The refractive index of diamond is 2.42. If the angle of incidence is 30°, calculate the angle of refraction. (Give your answer in degrees to 1 decimal place.)

49.Complete the sentence about total internal reflection.

50.State one practical application of total internal reflection.

51.Light travels from air into a glass block. The refractive index of the glass is 1.5. The angle of incidence is 30°. Calculate the angle of refraction. Use the formula n = sin i / sin r. (Give your answer to 1 decimal place.)

52.In a refraction experiment, a student measures a = 3.2 cm and b = 6.9 cm for i = 45°. The refractive index is given by n = 0.71 × (b/a). Calculate n.

53.Describe how you would use a ray box and a plane mirror to verify the law of reflection. Include the measurements you would take.

54.Explain what is meant by the critical angle when light travels from a denser to a less dense medium. Include a diagram in your explanation.

55.Light travels from air into a diamond. The refractive index of diamond is 2.42. If the angle of incidence is 30°, calculate the angle of refraction. (Give your answer in degrees to 1 decimal place.)

56.Light travels from air into a glass block. The refractive index of the glass is 1.5. The angle of incidence is 30°. Calculate the angle of refraction. Use the formula n = sin i / sin r. (Give your answer to 1 decimal place.)

57.In a refraction experiment, a student measures a = 3.2 cm and b = 6.9 cm for i = 45°. The refractive index is given by n = 0.71 × (b/a). Calculate n.