how do I do question 8. I keep on getting the wrong answer. 7.8 wave- the freque

Question

how do I do question 8. I keep on getting the wrong answer.

7.8 wave- the frequency of lighu having a wave- Whal s is the wavelength length of 456 nm? (b) What (in nanometers) of rad having a frequency of 2,45 x Hz? his is the type of radiation used in 10 microwave ovens is 7.9 average distance between Mars and Earth The about 1.3 x 10 miles. How long would it take TV pictures uransmitted from the Viking space vehicle on Mars' surfacc to reach Earth? (1 mile 61 km.) 7.10 How many minutos would it take a radio wave to travel from the planet Venus to Earth? (Average dis- Lance from Venus to Earth is 28 million miles.) Th

Explanation / Answer

a)

WL = 456 nm --> 456*10^-9 m

WL = c/v

v = c/WL = (3*10^8) / (456*10^-9) = 6.57*10^14 Hz

b)

WL for v = 2.45*10^9 Hz

Wl = c/v

WL = (2.45*190^9)/(3*10^8) = 8.16 meter

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