An eyeglass lens is cut with one surface having a radius R1 and ...

[luvbio]

An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2 . Both positive radii are measured from the same side with R2 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?
 a. This is neither, since a lens cannot be made this way.
  b. This is a diverging lens.
  c. This can be either a converging or diverging lens, as more information is needed for a final determination.
  d. This is a converging lens.

Question 2

Boltzmann's constant, kB, may be derived as a function of R, the universal gas constant, and NA, Avogadro's number. Which expresses the value of kB?
 a. NAR2
  c. R/NA
  b. NAR
  d. NA/R

[adammoses97]

Answer to Question 1

D

Answer to Question 2

C

[luvbio]

TYSM

[upturnedfurball]

Thanks for the timely response, appreciate it