Angular Magnification

Question 1

lateral (transverse) magnification

Answer 1

the ratio of image size to object size
m = image size / object size
(notation is just a number: “2”, for example)

Question 2

angular magnification

Answer 2

the ratio of the retinal image sizes before and after a change in viewing condition
viewing conditions that can change: 1) the eye’s object distance; 2) the object’s size
(notation is a number + x: “2x”, for example)

Question 3

in angular magnification, the ratio of the retinal image sizes is equivalent to the ratio of ___________.

Answer 3

nodal ray angles

Question 4

equations for angular magnification

Answer 4

M = I2/I1
M = w2/w1
M = u1/u2

Question 5

what two factors affect M due to a simple magnifier (plus lens)?

Answer 5

lateral magnification

change in object distance

Question 6

equation for angular magnification due to a simple magnifier

Answer 6

M = m(lens)*M(dis)
where m(lens) is the lateral magnification of the lens, and M(dis) is the relative distance magnification (ratio of the object distance of the eye to the object distance of the magnifier)