What is the energy of a photon of light of wavelength 4.80 107 Hz? h = 6.63 1034 Js and 1 eV = 1.6 1019 J.
a. 144 eV
b. 1.38 eV
c. 2.59 eV
d. 2.21 eV
[Ques. 2] Which of the following statements is false?
a. The angle in Snell's law is measured between the ray and a line perpendicular to the surface.
b. Photons of blue light have a higher energy than photons of red light.
c. A photon's energy depends on its brightness.
d. The ratio v/ of a photon's speed to its wavelength has the same value for any index of refraction n.
[Ques. 3] Light not only has wavelike properties, but also has particle-like properties. What are these particles of light called?
a. quarks b. wavicles
c. photons d. etherons
[Ques. 4] Who formulated the theory explaining the photoelectric effect?
a. Hertz
b. Maxwell
c. Newton
d. Einstein
[Ques. 5] The photoelectric effect was discovered by:
a. Maxwell.
b. Einstein.
c. Hertz.
d. Planck.
[Ques. 6] Newton's theory of light treated light as ________ while Young demonstrated that light behaved as ________ with ________ behavior.
a. particles, waves, refractive
b. particles, waves, interference
c. waves, particles, interference
d. waves, particles, refractive
[Ques. 7] Helium-neon laser light has a wavelength in air of 632.8 nm. What is the energy of a single photon in the beam? (h = 6.626 1034 Js and c = 3.00 108 m/s).
a. 3.14 1019 J
b. 5.40 1019 J
c. 7.62 1019 J
d. 1.15 1018 J
[Ques. 8] One phenomenon that demonstrates the wave nature of light is:
a. the photoelectric effect.
b. quantization effects.
c. absorption of light by an electron.
d. interference effects.
[Ques. 9] One phenomenon that demonstrates the particle nature of light is:
a. the photoelectric effect.
b. diffraction effects.
c. interference effects.
d. the prediction by Maxwell's electromagnetic theory.
[Ques. 10] What is the energy of a photon of frequency 3.30 1014 Hz? (h = 6.626 1034 Js)
a. 2.19E19 J
b. 2.01E20 J
c. 4.98E+47 J
d. 2.01E48 J
e. 4.57E+18 J
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