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Warm-Up What is the wavelength of a wave having a frequency of 3.76 x 10 14 s -1 ? λ = c/ν = 3.00 x 10 8 m/s = 7.98 x 10 -7 m 3.76 x 10 14 s -1.

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Presentation on theme: "Warm-Up What is the wavelength of a wave having a frequency of 3.76 x 10 14 s -1 ? λ = c/ν = 3.00 x 10 8 m/s = 7.98 x 10 -7 m 3.76 x 10 14 s -1."— Presentation transcript:

1 Warm-Up What is the wavelength of a wave having a frequency of 3.76 x 10 14 s -1 ? λ = c/ν = 3.00 x 10 8 m/s = 7.98 x 10 -7 m 3.76 x 10 14 s -1

2 What is the frequency of a 6.9 x 10 -13 m wave? ν = c/λ = 3.00 x 10 8 m/s = 4.3 x 10 20 s -1 6.9 x 10 -13 m

3 What is the wavelength of a 2.99 Hz wave? λ = c/ν = 3.00 x 10 8 m/s = 1.00 x 10 8 m 2.99 Hz

4 What is the wavelength of a 1.28 x 10 17 Hz wave? λ = c/ν = 3.00 x 10 8 m/s 1.28 x 10 17 Hz = 2.34 x 10 -9 m

5 What is the wavelength of 109.6 MHz wave? λ = c/ν = 3.00 x 10 8 m/s 109.6 MHz=109.6 x 10 6 Hz = 2.74 m

6 What is the energy of a 7.66 x 10 14 Hz wave? E = hν = 6.626 x 10 -34 Js x 7.66 x 10 14 Hz = 5.08 x 10 -19 J

7 What is the frequency of a wave carrying 8.35 x 10 -18 J of energy? ν = E / h = 8.35 x 10 -18 J = 1.26 x 10 16 s -1 6.626 x 10 -34 Js

8 What is the frequency of a 1.78 x 10 -15 J wave? ν = E / h = 1.78 x 10 -15 J = 2.69 x 10 18 s -1 6.626 x 10 -34 J-s

9 What is the energy of a 3.12 x 10 18 s -1 wave? E = h ν = 6.626 x 10 -34 J-s x 3.12 x 10 18 s -1 = 2.07 x 10 -15 J

10 What is the frequency of a 1.31 x 10 -22 J wave? What is its wavelength? ν = E / h = 1.31 x 10 -22 J = = 1.98 x 10 +11 s -1 6.626 x 10 -34 J-s λ = c/ν = 3.00 x 10 8 m/s 1.98 x 10 11 s -1 = 0.001 52 m = 1.52 x 10 -3 m

11 What is the wavelength of a 7.65 x 10 -17 J wave? ν = E / h = 7.65 x 10 -17 J = 1.15 x 10 17 s -1 6.626 x 10 -34 J-s λ = c/ν = 3.00 x 10 8 m/s = 1.15 x 10 17 s -1 2.61 x 10 -9 m

12 What is the energy of a 9,330 cm wave? ν = c/λ = 3.00 x 10 8 m/s x 100 cm 9,330 cm1 m = 3.22 x 10 6 s -1 E = h ν = 6.626 x 10 -34 J-s x 3.22 x 10 6 s -1 = 2.13 x 10 -27 J

13 What is the wavelength of a 1.528 x 10 -13 J wave? ν = E / h = 1.528 x 10 -13 J = 2.306 x 10 20 s -1 6.626 x 10 -34 J-s λ = c/ν = 3.00 x 10 8 m/s 2.306 x 10 20 s -1 = 1.30 x 10 -12 m

14 Which of the following types of radiation is not a part of the electromagnetic spectrum? – Microwave – X-ray – Beta ray – infrared

15 Which has the greatest energy? – Ultraviolet – Infrared – Green light – Blue light

16 Radiation with a longer wavelength have – A smaller frequency and higher energy – A smaller frequency and lower energy – A higher frequency and higher energy – A higher frequency and lower energy

17 Arrange the following electromagnetic radiations in order of decreasing wavelength (largest to smallest). – Infrared radiation from a heat lamp – Ultraviolet light form the sun – Dental X-rays – The signal from a short-wave radio station – Green light. 1 2 4 5 3

18 Compare the broadcast frequencies of the following two radio stations: KFGE = 98.1 MHz KBBK = 107.3 MHz Which has the fastest speed? KFGE KBBK SAME CAN’T TELL A photon of which would have the higher energy? KFGE KBBK SAME CAN’T TELL

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