001 (part 1 of 3) 1.0 points An incoming ray of light has a vacuum wave-
length of 589 nm.
a) If the light travels from flint glass
(n 1.66) to crown glass (n 1.52) with
an angle of incidence of 17.2°, find the angle
of refraction.
Answer in units of".
002 (part 2 of 3) 1.0 points
b) If the light travels from air to some medium
with an angle of incidence of 14.0° and an
angle of refraction of 11.00. find the refractive
index of the unknown medium.
003 (part 3 of 3) 1.0 points
c) If the light travels from air to diamond
(n = 2.119) at an angle of incidence of 53.7°.
find the angle of refraction.
Answer in units of

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

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