Observe and find a pattern a laser beam on to the surface of a clear plastic con
ID: 1588380 • Letter: O
Question
Observe and find a pattern a laser beam on to the surface of a clear plastic container filled with water. The path of the light is shown in the illustration for three different incident angles of the laser bean. What happens to the beam of light that is incident on an interface between two different media-for example, ray 1 reaching the top surface of the water or ray 3 reaching the bottom? Traditionally physicists use a line perpendicular to the air-water interface at the point at which a ray strikes it to record the changes in the directions of the bean. For the three situations illustrated describe any patterns(i) you observe when looking at rays 1 and 2 or rays 3 and 4. For the three situations illustrated describe any patterns(S) you observe when locking at rays 1 and 3 or rays 3 and 5.Explanation / Answer
Ans:a) If you draw a line perpendicular to the interface ant at the point of incidence, you will see that light is coming from air and transmit into water and again it passes through the water and transmitt and reflect on the water plastic interface.Now refractive index(ri) of water is grater then the ri of air and the ri of plastic is greater than the ri of water. now from snell's law we san tell that wen light falls on air-water interface the transmitted light in water goes near the perpendicular and the reflected light coming back to air at the same angle as the incident angle.And similar thing happen in water-plastic interface.
b)So here in 1 and 2, 1 is incident light in air-water interface and 2 is the reflected light in air, Similarly in 3 & 4, 3 is the incident light in water- plastic interface and 4 is the reflected light in water.
c)So here in 1 and 3, 1 is incident light in air-water interface and 3 is the transmitted light into water , Similarly in 3 & 5, 3 is the incident light in water- plastic interface and 5 is the transmited light intoplastic.
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