Light, Atomic, Nuclear Physics Review Problems PDF

Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) 1) Most of the waves in the electromagnetic spectrum are A) red light. B) blue light. C) green light. D) invisible for humans. 2) Electromagnetic waves consist of A) compressions and rarefactions of electromagnetic pulses. B)...

Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) 1) Most of the waves in the electromagnetic spectrum are A) red light. B) blue light. C) green light. D) invisible for humans. 2) Electromagnetic waves consist of A) compressions and rarefactions of electromagnetic pulses. B) oscillating electric and magnetic fields. C) particles of light energy. D) high-frequency gravitational waves. 3) Which of these electromagnetic waves has the shortest wavelength? A) radio waves B) infrared waves C) X-rays D) ultraviolet waves E) visible light waves 4) Compared to ultraviolet waves, the wavelength of infrared waves is A) shorter. B) longer. C) the same. 5) Compared to radio waves, the velocity of visible light waves in a vacuum is A) less. B) more. C) the same. 6) Which of the following is fundamentally different from the others? A) sound waves B) X-rays C) gamma rays D) light waves E) radio waves 7) When ultraviolet light is incident upon glass, atoms in the glass A) are forced into vibration. B) resonate. C) pass the light energy along practically undiminished. D) freely absorb and re-emit most of the ultraviolet light. 8) Consider light energy that is momentarily absorbed in glass and then re- emitted. Compared to the absorbed light, the frequency of the re-emitted light is A) considerably less. 1 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) B) slightly less. C) the same. D) slightly more. E) considerably more. 9) Compared to its average speed in air, the average speed of a beam of light in glass is A) more. B) less. C) the same. 10) Materials generally become warmer when light is A) absorbed by them. B) reflected by them. C) transmitted by them. D) all of these E) none of these 11) Sunburns are produced by A) ultraviolet light. B) visible light. C) infrared light. D) all of these E) none of these 12) A lunar eclipse occurs when the A) sun passes into Earth's shadow. B) moon passes into Earth's shadow. C) Earth passes into the sun's shadow. D) Earth passes into the moon's shadow. 13) The main difference between a radio wave and a sound wave is their different A) frequencies. B) wavelengths. C) energies. D) amplitudes. E) modes of travel. 14) If the sun were to disappear right now, we wouldn't know about it for 8 minutes because it takes 8 minutes A) for the sun to disappear. B) to operate receiving equipment in the dark. C) for light to travel from the sun to the Earth. D) all of these 2 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) E) none of these 15) What is the wavelength of an electromagnetic wave that has a frequency of 1 hertz? A) less than 1 m B) 1 m C) more than 1 m 16) What is the frequency of an electromagnetic wave that has a wavelength of 300,000 km? A) less than 1 Hz B) 1 Hz C) more than 1 Hz 17) At the same time an astronaut on the moon sees a solar eclipse, observers on Earth see A) a lunar eclipse. B) a solar eclipse. C) no eclipse at all. 18)Color depends on what characteristic of light? A) its frequency B) its amplitude C) both of these 19) What color light is transmitted by a piece of blue glass? A) red B) white C) blue D) yellow E) orange 20) The brightest color emitted by the sun is A) red. B) orange. C) yellow-green. D) green-blue. E) violet. 21) The complementary color of blue is A) red. B) green. C) yellow. D) cyan. E) magenta. 3 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) 22) Different colors of light correspond to different light A) velocities. B) intensities. C) polarities. D) frequencies. E) none of these 23) A mixture of cyan and yellow pigments appears A) orange. B) green. C) magenta. D) blue. E) blackish brown. 24) The greenish blue of water is evidence for the A) reflection of greenish-blue light. B) reflection of red light. C) absorption of greenish-blue light. D) absorption of red light. E) interaction between green and blue frequencies of light. 25) A red crab very deep in water, where sunlight is dim, appears A) red. B) orange. C) cyan. D) brown. E) no color – black. 26)A sheet of red paper will look black when illuminated with A) red light. B) yellow light. C) magenta light. D) cyan light. E) none of these 27) Light will almost always travel from one place to another along a path of least A) distance. B) time. C) effort. D) expense. E) complication. 28) Light travels fastest in A) warm air. 4 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) B) cool air. C) a vacuum. 29) Refraction results from differences in light's A) frequency. B) incident angles. C) speed D) all of these E) none of these 30) Light refracts when traveling from air into glass because light A) has greater intensity in air than in glass. B) has greater intensity in glass than in air. C) has greater frequency in air than in glass. D) has greater frequency in glass than in air. E) travels slower in glass than in air. 31) When a light beam emerges from water into air, the average light speed A) increases. B) decreases. C) remains the same. 32) Different colors are dispersed by a prism because different colors in the prism have different A) frequencies. B) speeds. C) directions. D) energies. E) none of these 33) A single raindrop illuminated by sunshine disperses A) a single color. B) either low-, middle-, or high-frequency colors in most cases. C) all the colors of the rainbow. 34)Your image in a plane mirror is A) virtual. B) real. C) both of these D) neither of these 35) Amongst the following media, a beam of light travels fastest in A) glass. B) water. C) plastic. 5 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) D) air. E) is the same in each of these 36) Rainbows exist because light is A) reflected. B) refracted. C) both of these D) neither of these 37) If the speed of light in a medium is 1.5 × 108 m/s, the medium's index of refraction is A) 2.0. B) 0.67. C) 1.0. D) 1.5. E) None of the above 38) Interference is a property of A) light waves. B) sound waves. C) water waves. D) all of these E) none of these 39) Light is emitted when an electron A) is boosted to a higher energy level. B) makes a transition to a lower energy level. C) neither of these 40) The highest frequency light of those below is A) red. B) green. C) blue. D) violet. E) all the same 41) Which color of light carries the most energy per photon? A) red B) green C) blue D) violet E) all the same 42) Astronomers can tell whether a star is approaching or receding from Earth by A) its temperature. B) its change in temperature. 6 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) C) its absorption spectra. D) the Doppler effect. E) all of these 43) Atoms can be excited by A) thermal agitation. B) electron impact. C) photon impact. D) all of these E) none of these 44) The energy of a photon depends on its A) speed. B) frequency. C) amplitude. D) all of these E) none of these 45) What do electrons have that protons always have in equal magnitude? A) mass B) charge C) energy D) all of these E) none of these 46) Which radiation has no electric charge associated with it? A) alpha rays B) beta rays C) gamma rays D) all of these E) none of these 47) The sources of X-rays and gamma rays, respectively, are A) electron clouds and the atomic nucleus. B) the atomic nucleus and electron clouds. C) both electron clouds. D) both the atomic nucleus. E) none of these 48) The atomic number of an element is the same as the number of its A) protons. B) neutrons. C) nucleons. D) neither of these 7 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) 49)The atomic mass number of an element is the same as the number of its A) protons. B) neutrons. C) nucleons. D) none of these 50) Generally speaking, the larger a nucleus is, the greater its A) stability. B) instability. C) neither stability nor instability 51) The half-life on an isotope is one day. At the end of three days, how much of the isotope remains? A) none B) one-half C) one-quarter D) one-eighth E) none of these 52) The half-life of a radioactive substance is INDEPENDENT of A) the number (if large enough) of atoms in the substance. B) whether the substance exists in an elementary state or in a compound. C) the temperature of the substance. D) the age of the substance. E) all of these 53) When an alpha particle is ejected from a nucleus, the nucleus then has less A) mass. B) charge. C) both of these D) neither of these 54) When a gamma ray is emitted by a nucleus, the nucleus then has appreciably less A) mass. B) charge. C) both of these D) neither of these 55) Object and image for a plane mirror lie A) along the same plane. B) equal distances from the mirror. C) at right angles to each other. D) all of these 8 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) E) none of these Answers 1) D 2) B 3) C 4) B 5) C 6) A 7) B 8) C 9) B 10) A 11) A 12) B 13) E 14) C 15) C 16) B 17) A 18) A 19) C 20) C 21) C 22) D 23) B 24) D 25) E 26) D 27) B 28) C 29) C 30) E 31) A 32) B 33) C 34) A 35) D 36) C 37) A 38) D 39) B 40) D 41) D 9 Light_Atomic_Nuclear Physics: A few Review Problems (Answers at the end) 42) D 43) D 44) B 45) B 46) C 47) A 48) A 49) C 50) B 51) D 52) E 53) C 54) D 55) B 10