Fig. 10.1 represents the electromagnetic spectrum. [Figure 10.1] visible light

1. (a)(i)State the name of the component of the electromagnetic spectrum that is found in region P,[2]
2. (a)(ii)Q,
3. (a)(iii)R.
4. (b)On Fig. 10.1, mark a tick (✔) in all of the boxes that represent the components with frequencies greater than the frequencies of visible light.[1]
5. (c)(i)The speed of electromagnetic radiation in a vacuum is 3.0 x 10⁸m/s. A television remote controller uses infra-red radiation of wavelength 9.4 × 10⁻⁷ m. Calculate the frequency of this radiation. frequency = [3]
6. (c)(ii)Explain how infra-red radiation is used in television remote controllers.[2]
7. (d)(i)Fig. 10.2 shows a ray of green light in air striking the side of a glass prism. [Figure 10.2 (not to scale)] The refractive index of the glass for green light is 1.5. On Fig. 10.2, 1. draw the normal for this ray, 2. mark the angle of incidence with a letter i.[1]
8. (d)(ii)This angle of incidence is 57°. Calculate the angle of refraction in the glass. angle of refraction = [2]
9. (d)(iii)1.State what happens, as the light enters the glass, to the light's frequency,[2]
10. (d)(iii)2.speed,
11. (d)(iii)3.wavelength.
12. (d)(iv)On Fig. 10.2, draw the path taken by the light as it passes through the glass and into the air.[2]

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