Answer Happy

1) Which of the following is a false statement? A) All points on a given wave front have the same phase. B) Rays are always perpendicular to wave fronts. C) All wave fronts have the same amplitude. D) The spacing between adjacent wave fronts is one-half wavelength. 2) The wave theory of light is attributed to A) Christian Huygens. B) Isaac Newton. C) Max Planck. D) Albert Einstein. 3) The particle theory of light is attributed to A) Christian Huygens. B) Isaac Newton. C) Max Planck. D) Albert Einstein 4) When a light wave enters into a medium of different optical density, A) its speed and frequency change. C) its frequency and wavelength change. B) its speed and wavelength change D) its speed, frequency, and wavelength change 5) When a beam of light (wavelength - 590 nm), originally traveling in air, enters a piece of glass (index of refraction 1.50), its frequency A) increases by a factor of 1.50. C) is unaffected B) is reduced to 2/3 its original value. D) none of the given answers 6) When a beam of light (wavelength = 590 nm), originally traveling in air, enters a piece of glass (index of refraction 1.50), its wavelength A) increases by a factor of 1.50. C) is unaffected. B) is reduced to 2/3 its original value. D) none of the given answers 7) What principle is responsible for light spreading as it passes through a narrow slit? A) refraction B) polarization C) diffraction D) interference 8) Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted. Why is this? A) Radio waves are unpolarized, whereas light is plane polarized. B) The wavelength of light is much smaller than the wavelength of radio waves. C) The wavelength of light is much greater than the wavelength of radio waves. D) Radio waves are coherent and light is usually not coherent. 9) What principle is responsible for alternating light and dark bands when light passes through two or more narrow slits? A) refraction B) polarization C) dispersion D) interference 10) Two light sources are said to be coherent if they A) are of the same frequency. B) are of the same frequency, and maintain a constant phase difference. C) are of the same amplitude, and maintain a constant phase difference. D) are of the same frequency and amplitude. 11) What do we mean when we say that two light rays striking a screen are in phase with each other? A) When the electric field due to one is a maximum, the electric field due to the other is also a maximum, and this relation is maintained as time passes. B) They are traveling at the same speed. C) They have the same wavelength. D) They alternately reinforce and cancel each other. 12) Two beams of coherent light travel different paths arriving at point P. If the maximum constructive interference is to occur at point P, the two beams must A) travel paths that differ by a whole number of wavelengths. B) travel paths that differ by an odd number of half-wavelengths.