The planet whose axis of rotation lies almost in its orbital plane is
a. Neptune.
b. Uranus.
c. Saturn.
d. Jupiter.
Question 2
Of the two main types of waves, light is a(n) ______________ wave.
Fill in the blank(s) with correct word
Question 3
The energy difference between the upper and lower levels in a certain laser is 1.9593 eV. What is the wavelength of the light emitted by the laser?