Department of Pre-University Education, Karnataka course PUC Karnataka Science Class 12
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# Suppose a Monochromatic X-ray Beam of Wavelength 100 Pm is Sent Through a Young'S Double Slit and the Interference Pattern is Observed on a Photographic Plate Placed 40 Cm Away from the Slit. - Physics

ConceptElectromagnetic Spectrum

#### Question

Suppose a monochromatic X-ray beam of wavelength 100 pm is sent through a Young's double slit and the interference pattern is observed on a photographic plate placed 40 cm away from the slit. What should be the separation between the slits so that the successive maxima on the screen are separated by a distance of 0.1 mm?

#### Solution

Given:

lambda = 10  "pm" = 100 xx 10^-12  "m"

D = 40  "cm" = 40 xx 10^-2  "m"

β = 0.1  "mm" = 0.1 xx 10^-3  "m"

β = (lambdaD)/d

d = (lambdaD)/β

= (100 xx 10^-12 xx 40 xx 10^-2)/(10^-3 xx 0.1)

= 4 xx 10^-7  "m"

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Solution Suppose a Monochromatic X-ray Beam of Wavelength 100 Pm is Sent Through a Young'S Double Slit and the Interference Pattern is Observed on a Photographic Plate Placed 40 Cm Away from the Slit. Concept: Electromagnetic Spectrum.
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