When `X`-rays if wavelength `0.5Å` pass through `10 mm` thick `Al` sheet than their intensity is reduced to one sixth . Find the absorption coefficient for Aluminium.

When X- ray of wavelength 0.5 Å pass through 7 mm thick aluminium sheet then their intensity reduces to one fourth. Find coefficient of absorbtion of aluminium for these X-rays.

How many times will the intensity of a narrow X -ray beam of wavelength 20pm decrease after passing through a lead plate of thickness d = 1.0 mm if the mass absorption coefficient for the given radiation wavelength is equal to mu//rho = 3.6 cm^(2)//g ?

A parallel light beam of wavelength 6000Å passes through a slit 0.2 mm wide and forms a diffraction pattern on a screen 1.0 m away from the slit. Find the width of the central maximum in mm on the screen.

A narrow beam of X- ray radiation of wavelength 62pm penetrates an aluminium screen 2.6 cm thick. How thick must a lead screen be to attenuate the beam just as much? The mass absorption coefficients of aluminium and lead for this radiations are equal to 3.48 and 72.0 cm^(2)//g respectively.

When light of wavelength 5000 Å in vacuum travels through same thickness in glass and water, the difference in the number of waves is 400. Find thickness. (Refractive indices of glass and water are (3)/(2) and (4)/(3) respectively)

When light of wavelength 5000 Å in vacuum travels through same thickness in glass and water, the difference in the number of waves is 400. Find thickness. (Refractive indices of glass and water are (3)/(2) and (4)/(3) respectively)

The intensity of X–rays of wavelength 0.5Å reduces to one fourth on passing through 3.5 mm. Thickness of a metal foil. The coefficient of absorption of metal will be–

50% of the X-ray coming from a Cooling tube is able to pass through a 0.1 mm thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of aluminium foil, which will allow 50% of the X-ray to pass through, will be

50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1 mm thick aluminum foil. The potential difference between the target and the filament is increased. The thickness of aluminum foil, which will allow 50% of the X-ray to pass through, will be