9. Quantum Mechanics

Electromagnetic Spectrum

9. Quantum Mechanics

Electromagnetic Spectrum

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Electromagnetic Spectrum

Electromagnetic Spectrum Example 1

Electromagnetic Spectrum

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What is the electromagnetic spectrum? - Invisible Labs with Craig Beals

04:23

What is the electromagnetic spectrum? - Invisible Labs with Craig Beals

ELECTROMAGNETIC SPECTRUM

The Electromagnetic Spectrum

Electromagnetic Radiation

What is the ELECTROMAGNETIC SPECTRUM

MooMooMath and Science

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What is Light? Maxwell and the Electromagnetic Spectrum

03:56

What is Light? Maxwell and the Electromagnetic Spectrum

Professor Dave Explains

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02:13

What is the Electromagnetic Spectrum?

MonkeySee

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Showing 7 of 7 videos

Practice this topic

Multiple Choice

Which of the following sources of electromagnetic radiation will have the highest frequency?

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Multiple Choice

A carbon–oxygen double bond within a sugar molecule absorbs electromagnetic radiation at a frequency of 6.0 x 10¹² s^-1. What portion of the electromagnetic spectrum does this represent?

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Multiple Choice

X-Ray detectors are devices that use scintillators to convert X-rays into light in order to detect X-Rays indirectly. Which of the following would be picked up by an X-Ray detector:radiation with a wavelength of 0.85 nm or a frequency of 6.52 x 10¹¹ s^-1?

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Multiple Choice

What frequency of light has a wavelength of 455 nm?

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Multiple Choice

Two radio stations broadcast at the following frequencies:

Station 1: 107.5 MHz Station 2: 98.1 MHz

Which of the following must be true?

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Textbook Question

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Textbook Question

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Textbook Question

The figure shows the three lowest regions of Earth's atmo- sphere.

(d) An aurora borealis is due to excitation of atoms and molecules in the atmosphere 55–95 km above Earth's surface. Which regions in the figure are involved in an aurora borealis?

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Textbook Question

Stars do not all have the same temperature. The color of light emitted by stars is characteristic of the light emitted by hot objects. Telescopic photos of three stars are shown below: (i) the Sun, which is classified as a yellow star, (ii) Rigel, in the constellation Orion, which is classified as a blue-white star, and (iii) Betelgeuse, also in Orion, which is classified as a red star. (a) Place these three stars in order of increasing temperature. (i) sun (ii) Rigel (iii) Betelguese

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Textbook Question

The familiar phenomenon of a rainbow results from the diffraction of sunlight through raindrops. (a) Does the wavelength of light increase or decrease as we proceed outward from the innermost band of the rainbow?

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Textbook Question

Label each of the following statements as true or false. For those that are false, correct the statement. (a) Visible light is a form of electromagnetic radiation.

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Textbook Question

Label each of the following statements as true or false. For those that are false, correct the statement. (c) X rays travel faster than microwaves.

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Textbook Question

Label each of the following statements as true or false. For those that are false, correct the statement. (b) Ultraviolet light has longer wavelengths than visible light.

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Textbook Question

Determine which of the following statements are false and correct them. Determine which of the following statements are false and correct them. (a) The frequency of radiation increases as the wavelength increases. (b) Electromagnetic radiation travels through a vacuum at a constant speed, regardless of wavelength. (c) Infrared light has higher frequencies than visible light. (d) The glow from a fireplace, the energy within a microwave oven, and a foghorn blast are all forms of electromagnetic radiation.

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Textbook Question

Arrange the following kinds of electromagnetic radiation in order of increasing wavelength: infrared, green light, red light, radio waves, X rays, ultraviolet light.

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Textbook Question

The wavelength at which the O2 molecule most strongly absorbs light is approximately 145 nm. (a) In which region of the electromagnetic spectrum does this light fall?

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Textbook Question

A laser pointer used in a lecture hall emits light at 650 nm. Using Figure 6.4, predict the color associated with this wavelength.

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Textbook Question

The ultraviolet spectrum can be divided into three regions based on wavelength: UV-A (315–400 nm), UV-B (280–315 nm), and UV-C (100–280 nm). (b) In the absence of ozone, which of these three regions, if any, are absorbed by the atmo- sphere?

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Textbook Question

It is possible to convert radiant energy into electrical energy using photovoltaic cells. Assuming equal efficiency of conversion, would infrared or ultraviolet radiation yield more electrical energy on a per-photon basis?

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Textbook Question

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Textbook Question

The energy from radiation can be used to rupture chemical bonds. A minimum energy of 192 kJ/mol is required to break the bromine–bromine bond in Br2. What is the longest wavelength of radiation that possesses the necessary energy to break the bond? What type of electromagnetic radiation is this?

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Textbook Question

A diode laser emits at a wavelength of 987 nm. (a) In what portion of the electromagnetic spectrum is this radiation found? (b) All of its output energy is absorbed in a detector that measures a total energy of 0.52 J over a period of 32 s. How many photons per second are being emitted by the laser?

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Textbook Question

A stellar object is emitting radiation at 3.0 mm. (a) What type of electromagnetic spectrum is this radiation (b) If a detector is capturing 3.0 3 108 photons per second at this wavelength, what is the total energy of the photons detected in 1 day?

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Textbook Question

Which has the higher frequency, red light or violet light? Which has the longer wavelength? Which has the greater energy?

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Textbook Question

An important reaction in the formation of photochemical smog is the photodissociation of NO : NO2 + hv → NO(g) + O(g) The maximum wavelength of light that can cause this reac- tion is 420 nm. (a) In what part of the electromagnetic spec- trum is light with this wavelength found?

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Textbook Question

Which has the higher frequency, infrared light or ultraviolet light? Which has the longer wavelength? Which has the greater energy?

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Textbook Question

The Hubble Space Telescope detects electromagnetic energy in the wavelength range 1.15 * 10-7 m to 2.0 * 10-6 m. What region of the electromagnetic spectrum is found completely within this range? What regions fall partially in this range?

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Textbook Question

The nearest star to our sun is Proxima Centauri, at a distance of 4.3 light-years from the sun. A light-year is the distance that light travels in one year (365 days). How far away, in km, is Proxima Centauri from the sun?

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Textbook Question

List these types of electromagnetic radiation in order of (ii) increasing energy per photon. a. radio waves b. microwaves c. infrared radiation d. ultraviolet radiation

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Textbook Question

The Green Bank Telescope in West Virginia—the world's largest steerable radio telescope—detects frequencies from 290 MHz to 90 GHz. What region or regions of the electro-magnetic spectrum are found completely or partially within its detection range?

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Textbook Question

List these types of electromagnetic radiation in order of (i) increasing frequency and (ii) decreasing energy per photon. a. gamma rays b. radio waves c. microwaves d. visible light

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Textbook Question

One of the emission lines of the hydrogen atom has a wavelength of 94.974 nm. (a) In what region of the electromagnetic spectrum is this emission found?

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Textbook Question

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Textbook Question

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Textbook Question

The human retina has three types of receptor cones, each sensitive to a different range of wavelengths of visible light, as shown in this figure (the colors are merely to differentiate the three curves from one another; they do not indicate the actual colors represented by each curve):

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Textbook Question

A photovoltaic cell contains a p–n junction that converts solar light to electricity. (a) Silicon semiconductors with a band-gap energy of 107 kJ/mol are commonly used to make photovoltaic cells. Calculate the wavelength that corresponds to the band-gap energy in silicon.

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Textbook Question

A photovoltaic cell contains a p–n junction that that converts solar light to electricity. An optimum semiconductor would have its band-gap energy matched to the wavelength of maximum solar intensity at the Earth's surface. (a) What is the color and approximate wavelength of maximum solar intensity at the Earth's surface? Refer to the figure for Problem 12.102.

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Textbook Question

Wide band-gap semiconductors have a band gap between 2 and 7 electron volts (eV), where 1 eV = 96.485 kJ>mol. The wide band-gap semiconductor GaN, used to construct the laser in Blu-ray DVD players, has a band gap of 3.44 eV. The material in the laser, GaxIn1-x N, has some indium substituted for gallium. (b) If the light from the device is blue, does partial substitution of indium for gallium increase or decrease the band gap of GaxIn1-x N compared to GaN?

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Textbook Question

Fill in the blanks with the appropriate region of electromagnetic radiation: UV, visible, infrared. (a) The Sun most strongly emits in the _____ and regions of electromagnetic radiation (b) The atmosphere filters out biologically damaging ______ radiation from incoming solar radiation and prevents it from reaching Earth. (c) The Earth most strongly emits ______ radiation. (d) Greenhouse gases absorb _______ radiation.

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Textbook Question

Why do the Earth and Sun have different emission spectra?

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Open Question

Arrange the following kinds of electromagnetic radiation in order of increasing wavelength: infrared, green light, red light, radio waves, x rays, ultraviolet light.

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Open Question

Place the following types of electromagnetic radiation in order of increasing wavelength (shortest at the top to longest at the bottom).

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