A narrow single slit (in air) in an opaque screen is illuminated by infrared light from He-Ne laser (=1152 nm). It is found that the center of the tenth dark band in the Fraunhofer pattern lies at an angle of 6.2 degree off the central axis. Determine the width of the slit. At what angle will the tenth minimum appear if the entire arrangement is immersed in water (n=1.33)?

spectral lines lyman is one set

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answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.