4 ms·
Yes the explanation is diffraction. As light passes through a lens, diffraction acts in similar way as a light through a small pinhole. Incidentally, pinholes
by sirpilade 3y ago
Yes the explanation is diffraction. As light passes through a lens, diffraction acts in similar way as a light through a small pinhole. Incidentally, pinholes and apertures are low pass filters.
Some more info here
Miles V. Klein, Thomas E. Furtak - Optics 2nd ed, Wiley
Joseph W. Goodman - Introduction to Fourier optics, W.H. Freeman