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Chapter 6: Problem 13

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. (b) Ultraviolet light has longer wavelengths than visible light. (c) X-rays travel faster than microwaves. (d) Electromagnetic radiation and sound waves travel at the same speed.

Short Answer

Expert verified
(a) TRUE - Visible light is a form of electromagnetic radiation. (b) FALSE - Ultraviolet light has shorter wavelengths than visible light. (c) FALSE - X-rays and microwaves travel at the same speed. (d) FALSE - Electromagnetic radiation and sound waves travel at different speeds.

Step by step solution

01

Statement (a) - Visible light as electromagnetic radiation

Visible light is indeed a form of electromagnetic radiation. Electromagnetic radiation encompasses a range of wavelengths and frequencies that includes visible light, with each color corresponding to a specific range of wavelengths. This statement is TRUE.
02

Statement (b) - Ultraviolet light's wavelengths compared to visible light

Ultraviolet light is also a form of electromagnetic radiation. When comparing it to visible light, ultraviolet light has SHORTER wavelengths, not longer. Therefore, this statement is FALSE. The correct statement should be: "Ultraviolet light has shorter wavelengths than visible light."
03

Statement (c) - X-rays vs. microwaves speed

Both X-rays and microwaves are forms of electromagnetic radiation. All forms of electromagnetic radiation travel at the same speed in a vacuum, which is the speed of light (approximately \(3.0 \times 10^8\) meters per second). Therefore, this statement is FALSE. The correct statement should be: "X-rays and microwaves travel at the same speed."
04

Statement (d) - Electromagnetic radiation and sound waves speed

Electromagnetic radiation and sound waves are two different types of waves. Electromagnetic radiation consists of oscillating electric and magnetic fields, and it travels at the speed of light. Sound waves, on the other hand, are vibrations that travel through a medium, such as air or water, at a speed that depends on the properties of the medium. In air, sound travels at approximately \(343\) meters per second, which is much slower than the speed of light. Therefore, this statement is FALSE. The correct statement should be: "Electromagnetic radiation and sound waves travel at different speeds."

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Most popular questions from this chapter

Scientists have speculated that element 126 might have a moderate stability, allowing it to be synthesized and characterized. Predict what the condensed electron configuration of this element might be.

(a) Account for formation of the following series of oxides in terms of the electron configurations of the elements and the discussion of ionic compounds in Section 2.7: \(\mathrm{K}_{2} \mathrm{O}, \mathrm{CaO}\) \(\mathrm{Sc}_{2} \mathrm{O}_{3}, \mathrm{TiO}_{2}, \mathrm{~V}_{2} \mathrm{O}_{5}, \mathrm{CrO}_{3} .\) (b) Name these oxides. (c) Consider the metal oxides whose enthalpies of formation (in \(\mathrm{kJ} \mathrm{mol}^{-1}\) ) are listed here. Calculate the enthalpy changes in the following general reaction for each case: $$ \mathrm{M}_{n} \mathrm{O}_{m}(s)+\mathrm{H}_{2}(g) \longrightarrow n \mathrm{M}(s)+m \mathrm{H}_{2} \mathrm{O}(g) $$ (You will need to write the balanced equation for each case and then compute \(\left.\Delta H^{\circ} .\right)\) (d) Based on the data given, estimate a value of \(\Delta H_{f}^{\circ}\) for \(\mathrm{Sc}_{2} \mathrm{O}_{3}(s)\)

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

Which of the following represent impossible combinations of \(n\) and \(l:(\) a \() 1 p,(\) b \() 4 s,(c) 5 f,(\) d) \(2 d ?\)

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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