A light ray in air passes through a block of glass. What can be stated with regard to its speed after it emerges from the block?
A. Speed is less than when in glass
B. Speed is less than before it entered glass
C. Speed is same as that in glass
D. Speed is same as that before it entered glass

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

root word, prefixes, and suffixes