The amount of energy a photon carries depends on its wavelength
Indicate whether the statement is true or false
T
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By using a compass to measure the magnetic field direction at various points adjacent to a long straight wire, you can show that the wire's magnetic field lines are
a. straight lines in space that go from one magnetic charge to another. b. straight lines in space that are parallel to the wire. c. straight lines in space that are perpendicular to the wire. d. circles that have their centers on the wire and lie in planes perpendicular to the wire. e. circles that have the wire lying along a diameter of the circle.
Two slits are illuminated with green light (l = 540 nm). The slits are 0.05 mm apart and the distance to the screen is 1.5 m. At what distance (in mm) from the central maximum on the screen is the average intensity 50% of the intensity of the central maximum?
a. 1 b. 3 c. 2 d. 4 e. 0.4
When long-wavelength light is seen in the interference colors of a soap bubble, the wavelength being cancelled is relatively
A) long. B) short. C) neither of these
Conversion of Units: Wall posters are usually sold curled up in cylindrical cardboard tubes. If the length of the tube is 0.845 m, and the inside diameter of the tube is 2.40 mm, what is the area of the poster expressed in square centimeters to the correct number of significant figures? (Assume the poster is just as long as the tube and does not overlap itself.)
A. 202.8 cm2 B. 637.1 cm2 C. 203 cm2 D. 319 cm2 E. 637 cm2