Consider a concave mirror with a focal length of 10.50 cm. a) Find the image dis

Question

Consider a concave mirror with a focal length of 10.50 cm. a) Find the image distance when the object distance is 10.50 cm. (Answer with ?1000 if the image does not exist.) Answer in units of cm.

b) Find the image distance when the object distance is 5.25 cm. (Answer with ?1000 if the image does not exist.) Answer in units of cm.

c) Find the magni?cation of the image for part b). (Answer with ?1000 if the image does not exist.)
d) Describe the image for part b).
1. virtual, inverted, larger
2. virtual, upright, larger
3. real, upright, smaller
4. None of these
5. virtual, upright, smaller
6. virtual, inverted, smaller
7. real, upright, larger
8. real, inverted, larger
9. real, inverted, smaller

Explanation / Answer

a)
given,

f = 10.5 cm

u = 10.5 cm (object distance)

Apply, 1/u + 1/v = 1/f

1/v = 1/f - 1/u

1/v = 1/10.5 - 1/10.5

v = infinite (image diatnce)

b)

given,

f = 10.5 cm

u = 5.25 cm (object distance)

Apply, 1/u + 1/v = 1/f

1/v = 1/f - 1/u

1/v = 1/10.5 - 1/5.25

v = -10.5 (image diatnce)

c)

2. virtual, upright, larger

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