# physics

posted by .

A certain LCD projector contains a single thin lens. An object 23.5 mm high is to be projected so that its image fills a screen 1.87 m high. The object-to-screen distance is 3.05 m.
(a) Determine the focal length of the projection lens.
mm
(b) How far from the object should the lens of the projector be placed in order to form the image on the screen?
mm

## Respond to this Question

 First Name School Subject Your Answer

## Similar Questions

1. ### physics

A 17.1 cm focal-length lens is used to project 35 mm slides onto a screen 4.77 m from the projector lens. What must be the width of the screen ( m) if the image of the slide is to just fill the screen?
2. ### calculus problem

the thin lens equation in physics is 1/s+1/S=1/f where s is the object distance from the lens,S is the image distance from the lens,and f is the focal length of the lens.Suppose that a certain lens has a focal length of 6cm and that …
3. ### college physics

A 4.5 cm long insect is perpendicular to the optical axis of a thin lens; the bug is 5.4 cm away from the lens. The lens forms an inverted image of the insect which is 0.9 cm long on a screen behind the lens. a. How far behind the …
4. ### physics

For a fixed distance L between the object and the screen, there are two positions (1 and 2) of a converging lens which produce a reel image on the screen. These two positions are D apart. a) Derive the expression for the focal length …
5. ### marymount academy

1.An object 2.5cm high is placed 10cm from a converging lens. if the local length of the lens is 5cm, a. How far from the lens will the image be formed?
6. ### physics

The moon's diameter is 3.48 106 m, and its mean distance from the earth is 3.85 108 m. The moon is being photographed by a camera whose lens has a focal length of 48.5 mm. (a) Find the diameter of the moon's image on the slide film. …
7. ### physics

Suppose an object is placed at a distance x from a screen and a converging lens of focal length f is placed between the object and the screen. What is the minimum separation distance x (in terms of f) for a real image to be formed …
8. ### physics

Procedure 1: Forming Real Images with a Converging Lens a) Obtain the focal length f of the small converging lens by focusing the image of a distant light bulb on the cardboard screen. Mount the lens and the screen on the meter stick. …
9. ### physics

2. An object is 20.0 cm from a converging lens, and the image falls on a screen. When the object is moved 4.00 cm closer to the lens, the screen must be moved 2.70 cm farther away from the lens to register a sharp image. Determine …
10. ### Physics

A thin convex lens produce a real image on an a screen . if an object of height 36mm is placed 2000mm from the screen ,an image of height 684mm will be produced .determine A) the distance of the object from the lens B) the focal length …

More Similar Questions