Ask a New Question

When the distance between the hole and floor is h1=20 cm, the images's length is l1=20 cm; when the distance between the hole and floor is h2=40 cm, the images's length is l2=36 cm . What is the length L of the ceiling lamp in m?

Ask a New Question or answer this question.

Similar Questions

1. An object of length 200cm is photographed when it is 100cm from the hole.if the distance from the pinhole to the screen is
1. 5 answers
The length of a rectangular floor is 2 feet more than its width. The area of the floor is 168 square feet. Kim wants to use a
1. 2 answers
The floor of a one-story building is 14 feet longer than it is wide (see figure). The building has 1472 square feet of floor
1. 1 answer
1. Realists reacted to the industrial revolution by creating what types of paintings?A. Images of the wealthy B. Images of the
1. 4 answers

more similar questions