What is the wavelength of a monochromatic light beam, where the photon energy is 2.00 eV? (h = 6.63 × 10^-34 J×s, c = 3.00 × 10^8 m/s, 1 nm = 10-9 m, and 1 eV = 1.6 × 10^-19 J)
a. 414 nm
c. 311 nm
b. 1243 nm
d. 622 nm
D
Physics & Space Science
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In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state n = 2?
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A laser is thrown upward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is 1.5 m/s2 and there is no atmosphere. How long does it take for the laser to reach the maximum height?
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Physics & Space Science