Why secondary maxima are less intense than the central maximum?
Why does the intensity of the secondary maximum become less as compared to the central maximum? Answer: The intensity of light of a secondary maximum goes on decreasing with the order of the maximum. Hence, the intensity of secondary maxima becomes less as compared to central maximum.
Why is there a significant fall in intensity of the secondary maxima as compared to the central maxima in a single slit diffraction pattern?
It is because, the intensity of the central maximum is due to wavelets from all parts of the slit, the first secondary maximum is due to wavelets from one third part of the slit only, the second secondary maximum is due to the wavelets from the fifth part only and soon.
Why the secondary maxima go on becoming weaker with increasing intensity?
If this path difference is, (the wavelength of light used), then P will be point of minimum intensity. /2. Thus, destructive interference takes place at P and therefore, P is a point of first secondary minimum. Therefore, maxima gets weaker with increasing n.
Why do the secondary maxima become weaker with increasing distance from the Centre?
At the center all the huygen sources from the slit opening interfere constructively and give you the maxima. Also if you go further out, the intensity becomes even smaller..
Why the intensity of the diffraction maxima are different?
Grating Intensity Comparison The grating intensity expression gives a peak intensity which is proportional to the square of the number of slits illuminated. Increasing the number of slits not only makes the diffraction maximum sharper, but also much more intense. Such a multiple-slit is called a diffraction grating.
What types of waves diffract?
Diffraction, the spreading of waves around obstacles. Diffraction takes place with sound; with electromagnetic radiation, such as light, X-rays, and gamma rays; and with very small moving particles such as atoms, neutrons, and electrons, which show wavelike properties.