How wot were 120 cm trom rwith a of a 10-cm-tall Ocal focal length of 40 cm? 5)

Question

How wot were 120 cm trom rwith a of a 10-cm-tall Ocal focal length of 40 cm? 5) Draw a ray diagram to locate the image of a I object located 90 cm from a convex mirror with length of 45 cm. How would your answer to Exercise 75 chan same object were 30 cm from a concave m focal length of 15 cm? if the 76. mirror with a 77) A convex mirror has a focal length of 60 cm. Draw a ra diagram to find the location and magnification of the image of an object located 30 cm from the mirror. 78. Repeat Exercise 77 for a concave mirror 79 If you place an object 40 cm in front of a concave spher- 80. You have a concave spherical mirror with a focal length 81 If Galileo and his assistant were 15 kmapart, how 82. Suppose Gaileo, in the experiment described in cal mirror with a focal length of 20 cm, where will the image be located? 30 cm. Where could you place a candle to make it apper to burn at both ends? long would it take light to make the round-trip? How time compare with reaction times of about Suppose Galileo, in the experiment d-trip? How does this 0.2 s? described in Exercie s delay was due to the ta 82. time of light rather than to his assistant's eg value would he have calculated for the speed of l al

Explanation / Answer

Using the mirror formula,

1/u + 1/v = 1/f

1/-40 + 1/v = 1/-20

1/v = -1/20 + 1/40

1/v = -1/40

v = -40 cm

The image is formed at 40 cm on same side of the mirror. Answer

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