Question 10 Ella is playing with a flashlight, observing how light behaves in different situations. Som
different speed. What situation would result in this change in speed?
The light moves from one material to another.
The flashlight becomes warmer the more it is used.
The light from the flashlight interacts with sunlight.
The batteries in the flashlight become weaker.

Which type of wave can travel without a medium

Ineed the answers for these promblems i have

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.