Thursday

February 26, 2015

February 26, 2015

Posted by **Anonymous** on Sunday, March 30, 2008 at 1:18am.

- physics -
**drwls**, Sunday, March 30, 2008 at 2:47amThe radius of curvature of the ornament is 6.0 cm and the focal length is half that, 3.0 cm. Because if is convex, the focal length is considered negative.

For the image position,

1/do + 1/di = 1/f = -1/3.0

Since there is a demagnification of 1/4, di = -do/4

I used a minus sign because the image will be virtual, behind the reflecting surface.

1/do + 1/di = 1/do -4/do = -1/3

-3/do = -1/3

do = 9 cm.

**Answer this Question**

**Related Questions**

physics - A child looks at his reflection in a spherical tree ornament 12 cm in ...

Claflin - A reflecting, spherical Christmas tree ornament has a diameter of 8.0 ...

physics - A spherical Christmas tree ornament is 5.34 cm in diameter. What is ...

Physics - A spherical glass ornament is 7.00 cm in diameter. An object is placed...

math - A spherical tree ornament is to be painted in bright colors. If the ...

math - A spherical tree ornament is to be painted in bright colors. If the ...

Math - A spherical tree ornament is to be painted in bright colors. If the ...

MATH 157 - A spherical tree ornament is to be painted in bright colors. If the ...

Physics - If you look at yourself in a shiny Christmas tree ball with a diameter...

physics - The far point of a nearsighted person is 5.8 m from her eyes, and she ...