Curved mirror question ANSWERS

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5. For a concave mirror of focal length 20 cm, where must you place the object

so that no image can be seen? Prove with a diagram and using the mirror

equation. @ S*rA J"i"t.'. C{o = 2oc_lrr

6. The Palomar Telescope has a focal length of 18 m. If the diameter of the

Sun is 1.39 x10e m and its distance to the Eafth is 1.49 x 1011 m, how large is

the image of the Sun? * Or l? = hi

7. Looking at the back of a spoon you can see an image of your face. If the

focal length of the spoon is 5.5 cm, and your face is 10.0 cm away and 22 cm

long:

a. What type of mirror is the spoon? COnveX

b. What sign should the focal length have (positive oruC.tin+i

c. What is the position of the image? -^ 3 ,S{crvr:

d. What is the magnification of the image? + C .3\r:

e. What is the size of the image? + ?.q Lc_vv:.

f . What is the orientation of the image? Upn ..*nt

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5. For a concave mirror of focal length 20 cm, where must you place the object so that no image can be seen? Prove with a diagram and using the mirror equation. @ S*rA J"i"t.'. C{o = 2oc_lrr 6. The Palomar Telescope has a focal length of 18 m. If the diameter of the Sun is 1.39 x10e m and its distance to the Eafth is 1.49 x 1011 m, how large is the image of the Sun? * Or l? = hi 7. Looking at the back of a spoon you can see an image of your face. If the focal length of the spoon is 5.5 cm, and your face is 10.0 cm away and 22 cm long: a. What type of mirror is the spoon? COnveX b. What sign should the focal length have (positive oruC.tin+i c. What is the position of the image? -^ 3 ,S{crvr: d. What is the magnification of the image? + C .3\r: e. What is the size of the image? + ?.q Lc_vv:. f . What is the orientation of the image? Upn ..*nt J

00 t'= J_ rj clo c{; ,ll _=_i. /Ocr6 3Ucnn d; _3 r =_l_ Sccrn 5uh" Ct - Lr 6Dcrn C u 2,J'; = JDcrru. da = l5on nfl = - d; .= lsrrn : b)i: lScrn )l 3oc:n 3eln l-l =Sc.. 'E oll = 3D.,ro - i +- c, _l dt I *L rYl. * c'li 6 . - 3o.r' = -l $ftrn o*L -l&rn .30clt. I -il-,^,. n^ 5tl6rr'' cl ) I -l'fun olu /) .I *> 3Dc'r fn= - clr il .)- I I -/0on I ') clo '=- ia +.- lxrn d, - Z1\ctn 2oBcrn dr I -Zq -Zcacrn d; -296i1 = 2oBc,rr C"k = - 1'llcrrn " lTl= - di 6 ibcrn = C,L{LlS =: o,({5 r - (-l.re.rr-r)

Page 1: ANsultr< Curued Mirror Ouestions c
Page 7: 7-- Q: f= 5 scrl') fn I,l , cj" d;

Curved mirror question ANSWERS

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