MIME-Version: 1.0 Content-Location: file:///C:/D9286902/Fall06.Phys1112.Quiz9.SolutionWeb.htm Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset="us-ascii" Department of Natural Sciences

 

Clayton State University

Department = of Natural Sciences

November 20, = 2006

 =

Physics 111= 2 – Quiz 9

 =

 =

Name  __Solution___________________________________

 

 If you = look at yourself in a shiny Christmas tree ball with a diameter of 9.0 cm when=

your face i= s 30.0 cm away from it,

 

a. Where is your image?

 

f =3D -2.25 cm

 

1/di + 1/do =3D 1/f

 

1/di =3D 1/f - 1/do =3D 1/(-2.25 cm) – 1/(30.0 cm) =3D - 0.478 cm-1<= /sup>

 

di<= /span> =3D -2.09 cm (2.09 cm in the back of the mirror)<= /span>

 

b. What is the lateral magnification ?

 

M =3D - di /do =3D - (-2.09 cm)/(30.0 cm) =3D + 0.0697

 = ;

 

c. Is the i= mage real or virtual?

 

Virtual= (di = <0).

 

 

d. Is it upright or inverted?

 

Upright (M > 0).