Question

VUSI VUL ILS pruul al Waveicuguns a 1.7 * 10 w dniu (U) 4.2 x 10 m. What are the frequencies of the two lines? What color do we see when we heat a rubidium compound? 5. One of the radiographic devices used in a dentist's office emits an X- ray of wavelength 2.090 x 10"m. What is frequency of this X-ray? 6. The eyes of certain reptiles pass a single visual signal to the brain when the visual receptors are struck by photons of a wavelength of 850 nm. If a total energy of 3.15 x 10 J is required to trip the signal, what is the minimum number of photons that must strike the receptor?

Answer 1

(o 4 not visible complete) 6 Formule using the ca ar ~= frequency - c= 3x108 mis 3x108 2.09x = 1.435x1 - 19. ha (use same formules for question 4 let n number of En= nhe so photons are emitted = 3.15*10-14 = nx 6.626x10 34 x 3x108 850x109 - 3.15xlör4 3.158850 - 1 3 4 7x10² 6.626* 36 10 3 = 1.347X105 photos