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You pass 633-nm laser beam through a narrow slit and observe the diffraction pattern on a screen 6 m away. If the slit width is

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You pass 633-nm laser beam through a narrow slit and observe the diffraction pattern on a screen 6 m away. If the slit width is 3x104 m, what is the distance between the first-order and the fifth-order dark fringe on the screen? Only consider dark fringes on one side of the central bright fringe. 1 cm = 1x102 m. O 2 cm 16 cm 5 cm 9 cm O 7 cm 22 cmA 0.3-m-tall real object is located on the left side of a converging lens. An image is formed on the right side of the lens. If the image is 1.5 m tall, and the object to image distance is 5 m, what is the focal length of the lens? O 0.3 m O 0.5 m O 1.5 m O 1.1 m O 0.7 m O 2 mYou combine lens A and lens B by placing them in contact so that their axes coincide, forming what is called a compound lens. The focal length of lens A is 10 cm; the focal length of lens B is unknown. When a 5-cm- tall real object is placed at 10 cm from the compound lens, an upright image with a height of 8 cm is formed. What is the focal length of lens B? O -8 cm O 24 cm 12 cm 8 cm O -16 cm O -32 cmRu-106 can be used to treat melanoma in the eye. This isotope decays by B emission with a half-life of 373 days. Suppose a fresh sample contains 6x10 nuclei of Ru-106. What is the decay rate of the sample after 700 days. 86 Bq 240 Bq O 4 Bq 180 Bq 449 Bq 35 B

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