Optics


   
 
Numerical - 27
27. The ratio of the intensities at minima to maxima in the interference pattern is 9:25. What will the ratio of the widths of the two slits be in Young's double slit experiment?
 
Suggested solution:
 
Intensity is proportional to the width of the slit. So, amplitude is proportional to the square root of the width of the slit.
 
 
Here represent the widths of the two slits.
 
 
 
 
 
  
     
   
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Optics

  		•  Reflection of Light
  		• Spherical Mirrors
  		• Sign Conventions and Rules for Drawing Ray Diagrams
  		• Relation between Focal Length and Radius of Curvature in Spherical Mirrors
  		• Mirror Formula
  		• Linear Magnification of Spherical Mirror
  		• Applications of Spherical Mirrors
  		• Refraction of Light
  		• Relation between Relative Refractive Index and Absolute Refractive Index
  		• Total Internal Reflection and its Application
  		• Spherical Refracting Surface
  		• Lenses
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  		• Lens Maker's Formula
  		• Ray diagrams for convex lens showing the formation and nature of image for different positions of the object
  		• Thin Lenses Placed in Contact
  		• Power of a Lens
  		• Prism
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  		• Astronomical Telescope
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  		• Wave Optics - Introduction
  		• Wavefront
  		• Huygen's Wave Theory
  		• Verification of Laws of Reflection on the basis of Huygen's Wave Theory
  		• Verification of Laws of Refraction based on Huygen's Wave Theory
  		• Superposition of Interference
  		• Interference of Light
  		• Coherent Sources
  		• Young's Double Slit Experiment
  		• Diffraction
  		• Resolving Power
  		• Polarization
  		• Malu's Law
  		• Scattering Due to Polarization
  		• Applications of Polarized Light
  		• Doppler Effect in Light
  		• Summary
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    Animations
  		• Reflection of Light
  		• Verification of Laws of Reflection
  		• Spherical Mirrors
  		• Formation of image by a Concave Mirror
  		• Formation of image by a Convex Mirror
  		• Uses of Spherical Mirrors
  		• Image due to Multiple Reflection of Light
  		• Refraction
  		• Verification of Laws of Refraction
  		• An Alternate Method
  		• Real Depth and Apparent Depth
  		• Some Effects of Refraction
  		• Total Internal Reflection
  		• Effects of Total Internal Reflection
  		• Lenses
  		• Image Formation by a Convex Lens
  		• Image Formation by a Concave Lens
  		• What is a Prism?
  		• Dispersion of White Light
  		• Angle of Deviation of a Prism
  		• Colour Phenomena in Nature
  		• External Features of the Human Eye
  		• Simple Microscope
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  		• Huygen's Wave Theory
  		• Verification of Snell's Law Using Huygens Principle
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  		• Diffraction of Light
  		• Polarisation of Light and Polaroids