45. The electromagnetic spectrum shows the wavelength and frequencies of light. Electromagnetic Spectrum Visible Radio Microwaves Infrared Ultraviolet X-ray Gamma Ray Low Frequency High Frequency Long Wavelength Short Wavelength How is infrared radiation different from visible light? O It is invisible and has a longer wavelength than visible light. O It has a shorter wavelength and lower frequency than visible light. It has a longer wavelength and higher frequency than visible light. O It is invisible and has an amplitude lower than visible light.

45. The electromagnetic spectrum shows the wavelength and frequencies of light. Electromagnetic Spectrum Visible Radio Microwaves Infrared Ultraviolet X-ray Gamma Ray Low Frequency High Frequency Long Wavelength Short Wavelength How is infrared radiation different from visible light? O It is invisible and has a longer wavelength than visible light. O It has a shorter wavelength and lower frequency than visible light. It has a longer wavelength and higher frequency than visible light. O It is invisible and has an amplitude lower than visible light.

Living by Chemistry

2nd Edition

ISBN:9781464142314

Author:Angelica M. Stacy

Publisher:Angelica M. Stacy

ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction

Section: Chapter Questions

Problem 20STP

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Suppose an atom in an excited state can return to the ground state in two steps. It first falls to an intermediate state, emitting radiation of wavelength 1 , and then to the ground state, emitting radiation of wavelength 2 . The same atom can also return to the ground state in one step, with the emission of radiation of wavelength . How are 1,2, and related? How are the frequencies of the three radiations related?
Human color vision is " produced" by the nervous system based on how three different cone receptors interact with photons of light in the eye. These three different types of cones interact with photons of different frequency light, as indicated in the following chart: Cone Type Range of Light Frequency Detected S 6.00-7.49 1014s1 M 4.76-6.62 1014s1 L 4.28-6.00 1014s1 What wavelength ranges (and corresponding colors) do the three types of cones detect?
6.10 Define the term refraction.
Consider the bright line spectrum of hydrogen shown in Fig. 11.10 . Which line in the spectrum represents photons with the highest energy? With the lowest energy?
In a FranckHertz experiment on hydrogen atoms, the first two excitation thresholds occur at 10.1 and 11.9 eV. Three optical emission lines are associated with these levels. Sketch an energy-level diagram for hydrogen atoms based on this information. Identify the three transitions associated with these emission lines. Calculate the wavelength of each emitted line.
When a tube containing hydrogen atoms is energized by passing several thousand volts of electricity into the tube, the hydrogen emits light than when passed through a prism, resolves into the "bright line" spectrum shown in Fig. 11.10. Why do hydrogen atoms emit bright lines of specific wavelengths rather than a continuous spectrum?
Explain the hydrogen emission spectrum. Why is it significant that the calm emitted is not while? How does the emission spectrum support the idea of quantized energy levels?
One type of electromagnetic radiation has a frequency of 107.1 MHz, another type has a wavelength of 2.12 1010 m, and another type of electromagnetic radiation has photons with energy equal to 3.97 1019 J/pboton. Identify each type of electromagnetic radiation and place them in order of increasing photon energy and increasing frequency.
Consider only the transitions involving the first four energy levels for a hydrogen atom: a. How many emissions are possible for an electron in the n = 4 level as it goes to the ground state? b. Which electronic transition is the lowest energy? c. Which electronic transition corresponds to the shortest wavelength emission?
Give a brief wave description of light. What are two characteristics of light waves?
6.99 The photoelectric effect can he used in engineering designs for practical applications. For example, infrared goggles used in night-vision applications have materials that give an electrical signal with exposure to the relatively long wavelength IR light. If the energy needed for signal generation is 3.51020J , what is the wavelength and frequency of light that barely can be detected?