Question

10. The index of refraction of clear mineral oil is 1.40 and the index of refraction of a type of glass is 1.50, If a beam of light enters the glass from the oil, 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.

(d) can’t tell from the information given.

13. A convex (converging) lens has focal length f. If an object is located at ”infinity” (very far away), the image formed is located at a distance from the lens

(a) of 2f.

(b) between f and 2f.

(c) off.

(d) between the lens and f.

(e) of infinity.

14. A dentist wants a small mirror that, when 1.00 cm from a tooth, will produce an image that is upright and 5.00 times larger. The focal length of the mirror must be

(a) +1.25 cm.

(b) +1.88 cm.

(c) +2.31 cm.

(d) +2.5 cm.

(e) -3.75 cm.

Answer 1