HW Quiz. A 15 cm diameter coil is oriented horizontally with the plane of the coil
... The reflections from A and B will interfere with each other producing ...
HW Quiz A 15 cm diameter coil is oriented horizontally with the plane of the coil perpendicular to a magnetic field of 0.8T pointing up. Over a period of .2s the field is changed at a constant rate to a field of 0.4 T pointing down. What is the average induced Emf in the coil? What is direction of the current in the coil Sections for Exam 2 Ch 19 through 19.7 Ch 20 ALL Ch 21 through 21.5 Ch 22 through 22.4 Ch 23 through 23.8 Ch 24 except 24-9
Interference from This Films
The reflections from A and B will interfere with each other producing constructive or destructive interference.
The phase change at the reflecting surface depends on the 2 indexes of refraction as shown above If n 2 n 1 there is no phase change, while is
n 2 n 1 there is a 180 degree phase change.
Example 24-8 Antireflective coatings on lenses.
Example 24-10 http://hyperphysics.phy-astr.gsu.edu/Hbase/phyopt/thinfilm.html http://www.fas.harvard.edu/~scidemos/LightOptics/ThinFilmInterference/ThinFilmInterference0 2.jpg
Polarization
A transverse wave is defined by a plane which contains the wave, as shown above. A plane polarizer is a device which allows only on plane of polarization to be transmitted.
Natural light is unpolarized , that is composed of many different planes of polarization. Polarized Sunglasses Reflections from shiny surface which produce glare are partially polarized in the horizontal plane. Therefore if you wear polarized sunglasses which admit only vertically polarized light the glare is
