Without glasses, a person can comfortably read a magazine when it ...

[pepyto]

Without glasses, a person can comfortably read a magazine when it is held at 60 cm from his eyes. What should be the focal length of his contact lenses to allow him to read the magazine comfortably at a distance of 30 cm?
 
  A) -30 cm
  B) +30 cm
  C) -60 cm
  D) +60 cm
  E) +90 cm

Question 2

Light enters glass from air. The angle of refraction will be
 
  A) greater than the angle of incidence.
  B) equal to the angle of incidence.
  C) less than the angle of incidence.

[DHRUVSHAH]

Answer to Question 1

D

Answer to Question 2

C