The distance between the ruled lines on a diffraction grating is 1900 nm. The grating is illuminated at normal incidence with a parallel beam of white light in the 400 nm to 700 nm wavelength band
What is the angular width of the gap between the first order spectrum and the second order spectrum?
A) 3.3° B) 5.3° C) 4.3° D) 6.3° E) 2.3°
A
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It's hot as blue blazes outside so you stand in front of your refrigerator with the door open to cool off. If you stand there long enough,
A. the room will eventually get colder. B. the room will stay the same temperature. C. the room will eventually get warmer.
Intensity of Sound: The intensity level is 65 dB at a distance 5.00 m from a barking dog. What would be a reasonable estimate for the intensity level if two identical dogs very close to each other were barking? You can ignore any interference effects.
A. 65 dB B. 68 dB C. 130 dB D. 136 dB
During a solar eclipse, the ________ casts a small circular shadow on the ________.
A. Sun; Moon B. Earth; Moon C. Moon; Sun D. Moon; Earth E. Earth; Sun
What is the energy of a photon that has a wavelength equal to the de Broglie wavelength of a proton having a speed of 7.1 × m/s? (mproton = 1.67 × 10-27 kg, c = 3.00 × 108 m/s)
A) 220 keV B) 150 keV C) 290 keV D) 360 keV E) 440 keV