In a double-slit experiment, the slit separation is 2.0 mm, and two wavelengths, 750. nm and 900. nm, illuminate the slits. A screen is placed 2.0 m from the slits
At what distance from the central maximum on the screen will a bright fringe from one pattern first coincide with a bright fringe from the other?
4.5 mm
You might also like to view...
Janice throws a stone horizontally from the roof edge of a 50. meter high dormitory. It hits the ground at a point 60. m from the building. What was the initial velocity?
A) 19. m/s B) 22. m/s C) g m/s D) 5.5 m/s E) 25. m/s
Two long straight parallel lines, #1 and #2, carry uniform positive linear charge densities. The charge density on line #2 is twice as great as the charge density on line #1
The locus of points where the electric field due to these lines is zero is A) along a line between the lines closer to line #2 than line #1. B) at a point midway between the lines. C) along a line perpendicular to lines #1 and #2. D) along a line between the lines closer to line #1 than line #2.
Which of these did Pierre and Marie Curie discover about radioactivity?
a. Uranium is the only radioactive element. b. Several other elements are radioactive, some more so than uranium. c. The radiation from radioactive isotopes is a specific form of X rays. d. The radiation from radioactive isotopes includes positrons. e. The amount of radiation depends on the salt the uranium is combined with.
The movement of a glacier is fastest
A) at the bottom. B) at its surface. C) in the middle. D) along the sides.