Question

A brick wall reflects the rays of light emitted from a candle lamp. But you
do not see the image of the candle through the wall. What is the reason?​

Answer 1

Hlo

Explanation:

Because Wall is not a transparent object

Answer 2

Answer:

For an image to be reflected back the whole wavefront must back scatter elastically, keeping its direction and phases. This is where the "flatness" discussed by others comes in.

On a rough surface part of the light may scatter elastically, but it becomes a point source at each bump, losing the phase of the wavefront, i.e. coherence. An addition of millions of such point sources is the result, the loss of coherence and image information; the color is a matter of what wavelenghts the wall has absorbed.

As others have stated the wavelength of the light defines how flat the surface has to be.