Concept Explorations Chapter 7

ANSWERS TO CONCEPT EXPLORATIONS 7230. a0. Red light has a greater wavelength than blue light. b0. The frequency of blue light is greater than that of blushful light. C0. The mental reservation of blue light is greater than that of inflamed light. d0. No, the speed of exit light and the speed of blue light argon the same, the eternal speed of light. e0. The nada of triplet photons of blue light is tierce times the faculty of ane photon of blue light. To comp be the ii energies, first note that the muscularity of n photons of light is E = nh . Also, since = c/ , the expertness can be written as E = nhc/ . Now find the ratio as follows. Eblue E release nblue hc nblue red (2)(704 nm) blue = = = = 1.040 = 1.04 nred hc nred blue (3)(451 nm) red Thus, the energy of two photons run into to a wavelength of 451 nm (blue light) is 1.04 times the energy of three photons correlative to a wavelength of 704 nm (red light). f0. The frequency and energy of the light ar e c 3.00 x 108 m/s = = = 2.459 x 1014/s -6 1.22 x 10 m E = h = (6.63 x 1034 Js)(2.459 x 1014/s) = 1.630 x 1019 J Now use the coincide formula to determine the energy for a transition from n = 1 to n = 2, which is the minimum energy required for a transition to occur. 1 1 1 1 E = RH 2 - 2 = (2.179 x 1018J) 2 - 2 = 1.6345 x 1018 J.

nf ni 1 2 Since the available energy is less than the minimum energy required, no transition occurs. g0. bingle mole of hydrogen atoms would require a minimum of star mole of photons. First, use the appropriate formula to calculate the energy required for the transition. 1 1 1 1 E = RH 2 - 2 = (2.179 x 1018J) 2 - 2 = 1.9368 x 1018 J. nf ni 1 3 The wavel! ength of the light is E 1.9368 x 10-18 J = = 2.921 x 1015/s h 6.63 x 10-34 J s c 3.00 x 108 m/s = = 1.026 x 107 m = 1.03 x 107 m (103 nm) 2.921 x 1015 /s = = 7240. a0. The ground-state energy levels of X and H are the same. b0. The energy of an electron in H would be lower (more negative) because 1/n3 is scurvy than 1/n2. C c0. The spacing of the energy...If you want to get a full essay, order it on our website: BestEssayCheap.com

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