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 

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science