Lesson 5&6 from Assignment

Question 1

Everything looks red through a red filter because

a) the filter absorbs red light and emits other colors
b) the filter reflects red light and transmits other colors.
c) the filter emits red light and absorbs other colors.
d) the filter transmits red light and absorbs other colors.

Answer 1

d (the filter transmits red light and absorbs other colours)

Question 2

Suppose you built a scale-model atom in which the nucleus was the size of a tennis ball. About how far would the cloud of electrons extend? 
a) a few tens of meters
b) a few meters
c) several centimeters
d) several kilometers
to the Sun

Answer 2

d (several kilometres)

Question 3

What is the angular resolution of the human eye?

a) About 1 degree
b) About 1 arcsecond (1/3600 of a degree)
c) About 1 milliarcsecond
d) About 1 arcminute, or 1/60 of a degree

Answer 3

d (about one arcminute, or 1/60 of a degree