In a Young's double-slit interference apparatus, by what factor is the distance between adjacent light and dark fringes changed when the separation between slits is tripled?
a. 1/9
b. 1/3
c. 1
d. 3
e. 9
b
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Which of the following statements are true for the Bohr model of the atom? (There could be more than one correct choice.)
A) The spacing between all the electron shells is the same. B) The energy difference between all the electron shells is the same. C) As we look at higher and higher electron shells, they get closer and closer together, but the difference in energy between them gets greater and greater. D) As we look at higher and higher electron shells, they get farther and farther apart, but the difference in energy between them gets smaller and smaller. E) There is no general pattern in the spacing of the shells or their energy differences.
A ray of light is incident on the mid-point of a glass prism surface at an angle of 20° with the normal. For the glass, n = 1.60, and the prism apex angle is 40°. What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism? The surfaces involved are those of the apex angle
a. 12.3° c. 22.7° b. 38.0° d. 27.7°
The symbol indicating the number of protons in a nucleus is __________
Fill in the blank(s) with correct word
During winter at a particular pole on Mars, some of the carbon dioxide in the atmosphere
A) freezes out onto the surface B) escapes into space C) condenses into liquid on the surface D) is destroyed by ultraviolet radiation from the Sun