Question

afound that the energy ofone photonis 4 LAnd the following of this light? Om I (b) wavelength of this light (c) the color of light? this 19. In astronomy it is often necessary to be able to detectiusta few photons because the light signals from distant stars are so weak A t meter registers a TOTAL enero or405 x 101"Ifrom radiation of 540 nm wavelength How many light photons has the light meter detected? 20 lfitis found that the enero ofone photon is 48sx10 island there is a malfunction of equipment, could you find the Dida) frequency ofthis light? uWhnu (b) length of this light? c) the color ofthis light? If the human eye must receive total energy of 7.28 x10' ofenery in order to be able to detect light, how many photons of this particular light must fall on the retina? e) Would it require more or less photons wavelength 730 nmin order to be able to see it? of 21.Which would have the higher frequency, yellow light or green? 22. While doing an experiment with volatile materials in a chemistry lab, your apparatus blows up with a bright flash of light. There just happened to be a photometer turned on in the lab, and it registered total light energy ofi.19x 10-14 The total number of photons was 30 000, and they all had the same wavelength. a) What color of light did you see? 3inmet) What was the wavelength of the light? What is the frequency of the light? biNK2 23. What the wavelength oflightin millimeters if the frequency issssx10r. Hz? What is the frequency oflight whose wavelen is 7.2 x 106 cm? gth (b) Is this visible light?

Are these right? And can you help with the questions unanswered? Thank you!

Answer 1

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