Mirrors

Question 1

Know where real and virtual images are for mirrors

Answer 1

rays converge in front –> real; rays converge behind —> virtual

Question 2

What happens to img if it’s behind point of curvature and focal point of concave mirror?

Answer 2

real img, smaller, inverted (-M)

Question 3

What happens to img if it’s at point of curvature of concave mirror?

Answer 3

real img, same size, inverted (-M)

Question 4

What happens to img if it’s in b/w point of curvature and focal point of concave mirror?

Answer 4

real img, bigger, inverted (-M)

Question 5

What happens to img if it’s at focal point of concave mirror?

Answer 5

no img

Question 6

What happens to img if it’s in front of focal point of concave mirror?

Answer 6

virtual img, bigger, upright (+M)

Question 7

Do rays con/diverge for concave/vex mirrors?

Answer 7

concave mirrors converge, convex mirrors diverge

Question 8

What happens to img if it’s in front of a convex mirror?

Answer 8

virtual img, upright, smaller

Question 9

Formulas for unifying eqn mirrors/lenses thingy

Answer 9

1/f = 1/di + 1/do; M = hi/ho = -di/do; f = R/2

Question 10

What does M (magnification) tell you?

Answer 10

+ = upright, - = inverted; abs(value) < 1 —> smaller, abs(value) > 1 —> bigger, abs(value) = 1 —> same

Question 11

Pos/neg f and r mean what?

Answer 11

Pos = converging mirror (ie. concave)
Neg = diverging mirror (ie. convex)

Question 12

Pos/neg di/o mean what?

Answer 12

pos = front of mirror (ie. real), neg = behind mirror (ie. virtual)

Question 13

Focal length and its formula

Answer 13

Distance b/w focal point and mirror; f = r/2 (focal point is basically the half distance b/w center of curvature and mirror)

r=radius of curvature which is the distance b/w center of curvature and mirror

Question 14

How do you know if img is real or virtual from calculation?

Answer 14

Not sure if you can from calculation but if you calculate the img is real (ie. Pos di/do) then real imgs = ALWAYS inverted for mirrors

Question 15

Spherical aberration vs chromatic aberration vs dispersion

Answer 15

Blurring of periphery due to inadequate reflection of parallel beams at edge of mirror or inadequate refraction of parallel beams at edge of lens vs dispersive effect within a lens vs when various wavelengths of light separate from e/o (ex: white light splitting into different colors thru a prism; this can happen during diffraction or refraction)