Fill in the blanks (answers at the bottom):

1. The mirror formula is 1/v _____ 1/u = 1/f; the lens formula is 1/v _____ 1/u = 1/f.
2. For a concave mirror, f is _____ (positive/negative).
3. Object distance u is always _____ for real objects.
4. Mirror magnification m = _____v/u; Lens magnification m = _____v/u.
5. TIR requires light to travel from _____ to _____ medium, and the angle must be _____ the critical angle.
6. sin θ_c = _____ for a glass-air interface.
7. Power P = _____ (with f in metres). Unit: _____.
8. For a convex lens, f is _____ and P is _____.
9. At minimum deviation in a prism, i _____ e and r = _____.
10. Astronomical telescope magnification M = _____ and tube length L = _____.
11. Compound microscope objective has _____ focal length than eyepiece.
12. Diamond has n = 2.42. Critical angle ≈ _____.
13. f = R/2 where R is the _____ of curvature.
14. For biconvex lens (equal radii R): 1/f = _____.
15. Dispersive power ω = _____.

Answers:

1. • (mirror); − (lens)
2. Negative
3. Negative
4. − (mirror); no minus (lens, coefficient +1)
5. Denser to Rarer; greater than (exceeds)
6. 1/n_glass (= n_air/n_glass = 1/1.5 = 2/3)
7. 1/f; Dioptre (D)
8. Positive; positive
9. =; A/2
10. −f_o/f_e; f_o + f_e
11. Shorter
12. ≈ 24.4°
13. Radius
14. 2(n−1)/R
15. (n_v − n_r)/(n_y − 1)