A particular object appears to be red. The reason it appears red is: 1. It absorbs only red frequencies as they hit. 2. It reflects only red frequencies as they hit. 3. It absorbs red frequencies more than other frequencies. 4. It reflects red frequencies more than other frequencies. 5. It emits red frequencies more than other frequencies. 6. Not enough information.

A particular object appears to be red. The reason it appears red is: 1. It absorbs only red frequencies as they hit. 2. It reflects only red frequencies as they hit. 3. It absorbs red frequencies more than other frequencies. 4. It reflects red frequencies more than other frequencies. 5. It emits red frequencies more than other frequencies. 6. Not enough information.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Q1. The air in a dark, smoky room often looks bluish when illuminated by white light. What creates this bluish appearance? (clue, Rayleigh scattering) Q2. A diamond pendant sparkles with color when you look at it in sunlight. From where do the colors come. (clue, dispersion) Q3. A thin layer of oil or gasoline floating on water appears brightly colored in sunlight. From where do the colors come (clue, Interference)
Which of the following conditions must two waves satisfy for observable interference to occur between them? O A. Equal amplitude O B. Same polarization O C. Monochromatic O D. Different wavelengths
1:24 G O O * N 5GUC I 67%, Show What You Know: Learning... KO> O 5 de 8 A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for when the recorded sound moves through the speaker. The frequency or amplitude of the waves will not change. The speaker changes the wave from O mechanical wave to an electromagnetic wave. The speaker changes the wave from an O electromagnetic wave to a mechanical wave. The waves from the speaker are electromagnetic waves. The frequency or amplitude of the waves could change. The waves from the speaker are mechanical waves. The speaker does not change the wave type. Siguiente II
3. A modulator produces an output signal that is the modulated wave from the interaction between the modulating wave and the carrier, as indicated in the following block diagram: modulator MODULATOR Output (modulated wave) o(t) Vm(t)=Amsen(mt) Carrier vc(t)=Acsen(act) The output signal (modulated, AM) can be represented mathematically by the expression: PAM (t) = [Ac + Amsen(wmt)]sen(w_t) where the subscripts c and m are for carrier (carrier) and information (modulator), respectively. The maximum amplitudes of each wave are represented by the letter A. The amplitude of the modulator Am is usually replaced by mac to adjust the amplitude ratio between carrier and information, so that an adequate modulation index is obtained. Develop the operation indicated in the previous expression to AM. a. Write the name that corresponds to each term of the expanded expression b. What is the amplitude of each of the sidebands as a function of the modulation index m and the amplitude of the carrier…
Why is the sky blue at midday?-There is a large amount of water in the air and water is blue, so the sky is blue.-Interstellar dust particles interacting in the upper atmosphere cause a cascade of red, green, and blue light, but only the blue light is bright enough to reach the Earth's surface. -Light is scattered from molecules in the sky. The molecules resonate most strongly at higher frequencies/lower wavelengths, so the greatest intensity of scattered light is at the blue end of the spectrum.-Light is scattered from molecules in the sky but only the blue light reaches the Earth's surface.
27. Which wavelength is not a possibility for a 1 m long pipe open at both ends? O A. 0.25 m O B. 0.5 m OC. 1 m O D. 2 m O E. 4 m Back Save & Continue
2. Show, provided c= /k, then E = Eo sin(kx - wt) is a solution to the wave equation: where the operator 7² = V²E 2² 0x² = î+ 1 0²E c² at² 2² 2² + ·k dz² dyzî.
Q1. A non-periodic composite signal contains frequencies from 5 to 40 KHz. The peak amplitude is 10 V for the lowest and the highest signals and is 30 V for the 20-KHz signal. Assuming that the amplitudes change gradually from the minimum to the maximum and then maximum to the minimum, draw the frequency spectrum.