Question

Concave Mirrors

"Take first an object in the region between the mirror and focal point. The nearer the object is to the focal point, the weaker the intensity of light will be, but the larger the image will be. The farther away the object is from the focal point (closer to the mirror), the stronger the intensity of light will be, but the smaller the image will be. In both cases the image will be upright."

a. verify these statements using the imaging equation (1/d_o +1/d_i = 1/f) and magnification (M = −d_i/d_o). You do not have any specific numbers, but you can try some numbers or consider the cases where d_o → f and where d_o → 0, and show you would get the type of images discussed.

b. Why does this say that when the object is close to the mirror, the intensity of the image is greater?

Answer 1

For the case of reflection through a concave mirror when the object is placed between the mirror and focal point two different cases is shown below .