Light Physics...?

Question

Light incident upon a pane of glass slows down in passing through the glass does it emerge at a slower speed or at its initial speed?
initial speed
slower speed

What evidence can you cite to support the idea that light can travel through a vacuum?

What determines whether or not a material is transparent or opaque?

Which theory of light is the photon more consistent with -- the wave theory or the particle theory?

Short wavelengths of visible light interact more frequently with the atoms in glass than do longer wavelengths. Which do you suppose take the longer time to get through glass -- red light or blue light?

What is the difference between light that is polarized and light that is not?

What percentage of light would be transmitted by two ideal polarizing filters, one atop the other, with their axes aligned?
%
With their axes crossed at right angles?
%

What is the source of electromagnetic waves?

Answer 1

Initial speed.

Ordinary filament bulbs and Torricelli’s vacuum in mercury barometer consists of vacuum. We can see objects through the glass consisting of vacuum. It shows that light can travel through vacuum.

The shadow of an object determines whether an object is opaque or transparent. In other words, the emergent rays determine; no emergent ray implies the object is opaque.

Theory of photo electric emission.

Wavelength of blue is less compared to red. Blue takes more time to get through glass.

Eye, unaided by devices, cannot distinguish polarized and polarized light. In unpolarized light, electric vectors are oriented in all direction to the direction of motion of the wave. In polarized light electric vectors are not oriented in all directions.

100%

0%.

Electric Charges accelerated non uniformly are the sources of E.M waves.

Answer 2

initial
sunshine
structure of atoms
both
blue
polarized light has the wave structure aligned while the none polarized has it arranged randomly.
100%
0%
anything heated, electric currents, magnetic fields,