076 Spring 2018- Exam 2- April 13th Which of the following paivy shortest wavel

Question

076 Spring 2018- Exam 2- April 13th Which of the following paivy shortest wavel represent lighe with the st d ue, violet b. s ot espectively? yellow c. red, violet d. green, blue c. yellow, red f none of the above 25. When wav is calleds of equal amplitude from two sources are in phase when they interact, a. destructive interference. b. diffraction. c, c d. effusion e. amplitude. f. some of the above 26. Calculate the frequeney of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm. a. 1.46 × 1014 s-1 b. 6.86x 10-1 c. 4.33 x10s- d. 6.17× 10",-1 e. 1.62 10 -1 27. What total energy (in kJ) is contained in 1.0 mol of photons, all with a frequency of 2.75 x 1014 Hz? a. 457 kJ b. 326 kJ C. 182 k d. 219 kJ e.110kJ 28. For n-4, what are the possible values for ? a. 0 b. 0,1 c. 0, 1, 2 d. 0, 1, 2, 3 e, 0, 1,2, 3, 4

Explanation / Answer

24. Light with longest and shortest wavelength are,

c. red, violet

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25. When waves of two aplitude from sources in phase interact are called,

c. constructive interference

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26. wavelength = 486.1 nm = 486.1 x 10^-9 m

frequency = 3 x 10^8/486.1 x 10^-9 = 6.17 x 10^14 s-1

d. 6.17 x 10^14 s-1

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27. total energy = hv

                          = 6.626 x 10^-34 x 2.75 x 10^14 x 6.023 x 10^23/1000

                          = 110 kJ

e. 110 kJ

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28. For n = 4, possible values for l = n-1 = 3, that is,

c. 0,1,2

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