A magnifying glass has a convex lens of focal length 15 cm. At what distance from a postage stamp should you hold this lens to get a magnification of +2.0?


7.5 cm

Physics & Space Science

You might also like to view...

Adding multimedia components to your website can lead to longer download times.

Answer the following statement true (T) or false (F)

Physics & Space Science

By what factor must one change the weight suspended vertically from a spring coil in order to double its period of simple harmonic motion?

a. 4 c. 1/2 b. 2 d. 1/4

Physics & Space Science

What causes this disk to form and flatten?

Choose one: A. angular momentum B. linear momentum

Physics & Space Science

The average speeds v and molecular diameters d of five ideal gases are given below. The number of molecules per unit volume is the same for all of them. For which is the collision rate the greatest?

A. v = v0 and d = d0 B. v = 2v0 and d = d0/2 C. v = 3v0 and d = d0 D. v = v0 and d = 2d0 E. v = 4v0 and d = d0/2

Physics & Space Science