A blend of colors in sunlight’s spectrum
A. Prism or A Diffraction Grating |
B. Annie Jump Cannon |
C. Temperature |
D. Spectroheliometer |
E. Continuous Spectrum |
F. Joseph Van Fraunhofer |
E. Continuous Spectrum
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Your radio is tuned to 98 on the FM dial. What electromagnetic wave frequency is your radio receiving, and how fast is this wave traveling?
A) 98 × 106 Hz, at the speed of sound B) 98,000 Hz, at the speed of sound C) 98 Hz, at a speed of 300,000 km/s D) 98,000 Hz, at a speed of 300,000 km/s E) 98 × 106 Hz, at a speed of 300,000 km/s
The Balmer series of emission lines from hydrogen lie in the ________ part of the EM spectrum
a. near infrared b. infrared c. visible d. ultraviolet
After an electron has been accelerated through a potential difference of 0.15 kV, what is its de Broglie wavelength? (e = 1.60 × 10-19 C, melectron = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s)
A) 0.10 nm B) 1.0 nm C) 1.0 mm D) 1.0 cm
Uncertainty Principle Using Momentum and Position: An electron is trapped in a quantum well that is 48.6 nm wide. Calculate the minimum uncertainty in its velocity. (h = 6.626 × 10-34 J ? s, melectron = 9.11 × 10-31 kg)
A. 7.49 × 103 m/s B. 1.79 × 104 m/s C. 2.38 × 103 m/s D. 3.34 × 104 m/s E. 1.01 × 103 m/s