Athin film of oil of thickness t is floating on water. the oil has index of refraction no = 1.4. there is air above the oil. when viewed from the air in the direction normal to the surface, there is constructive interference of reflected red light with lambda = 675 nm. find the minimum thickness t of the oil film that will give constructive interference of reflected light with lambda = 675 nm.

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b. refraction c. diffraction d. interference

Can you match these to the correct definition

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.