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11) Food can be cooked by ________ radiation. A) ultraviolet B) gamma C) microwave D) x-ray E) radio 12) When waves of equal amplitude from two sources are out of phase when they interact, it is called A) destructive interference. B) diffraction. C) constructive interference. D) effusion. E) amplitude. 13) When waves of equal amplitude from two sources are in phase when they interact, it is called A) destructive interference. B) diffraction. C) constructive interference. D) effusion. E) amplitude. 14) When a wave encounters an obstacle or a slit that is comparable in size to its wavelength, it bends around it. This characteristic is called A) destructive interference. B) diffraction. C) constructive interference. D) effusion. E) amplitude. 15) Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of 6.88 × 1014 Hz. A) 229 nm B) 436 nm C) 206 nm D) 485 nm E) 675 nm 16) Which of the following occur as the energy of a photon increases? A) The frequency decreases. B) The speed increases. C) The wavelength increases D) The wavelength gets shorter. E) None of the above occur as the energy of a photon increases. 17) Which of the following occur as the wavelength of a photon increases? A) The frequency decreases. B) The energy increases. C) The speed decreases. D) Planck’s constant decreases. E) None of the above occur as the wavelength of a photon increases. 18) Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 × 1014 Hz. A) 2.75 × 10-19 J B) 3.64 × 10-19 J C) 5.46 × 10-19 J D) 1.83 × 10-19 J E) 4.68 × 10-19 J 19) Calculate the energy of the orange light emitted, per photon, by a neon sign with a frequency of 4.89 × 1014 Hz. A) 3.09 × 10-19 J B) 6.14 × 10-19 J C) 3.24 × 10-19 J D) 1.63 × 10-19 J E) 5.11 × 10-19 J 20) Calculate the frequency of the green light emitted by a hydrogen atom with a wavelength of 486.1 nm. A) 1.46 × 1014 s-1 B) 6.86 × 1014 s-1 C) 4.33 × 1014 s-1 D) 6.17 × 1014 s-1 E) 1.62 × 1014 s-1

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