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A wedge-shaped film of air is produced b...

A wedge-shaped film of air is produced by placing a fine wire of diameter D between the ends of two flat glass plates of length `L = 20 cm`, as shown in the figure-6.68. When the air film is illuminated with light of wavelength `lambda = 5500Å`, there are 12 dark fringes found per centimeter on the wedge. Find the wire diameter D.

`[6.6 xx 10^(-5)m]`

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PHYSICS GALAXY - ASHISH ARORA-WAVE OPTICS-Practice Exercise
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  3. A Lloyd's mirror or length 5 cm is illuminated with mon ochromatic lig...

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  4. In figure S is a monochromatic point source emitting light of waveleng...

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  5. In Young's experiment, the source is red light of wavelength 7xx10^(-7...

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  6. In Young’s double slit experiment, the upper slit is covered by a thin...

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  7. A coherent parallel beam of microwaves of wavelength lambda = 0.5 mm f...

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  8. A slit of width d is illuminated by white light (which consists of all...

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  9. Our disscusssion of the techniques for determining cosntructive and de...

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  10. A soap film of thickness 0.0011 mm appears dark when seen by reflected...

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  11. A wedge-shaped film of air is produced by placing a fine wire of diame...

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  12. A thin soap film of thickness 3 xxx 10^(-7)m and mu = 1.5 is spreaded ...

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  13. A ray light of intensity I is incident on a parallel glass-slab at a p...

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  14. A point sources S emitting light of wavelength 600nm is placed at a ve...

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  15. A slit is located 'at infinity' in front of a lens of focal length 1 m...

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  16. From large distance microwaves fall on a long slit of width 5cm. If th...

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  17. A parallel beam of monochromatic light of wavelength 5900Å falls norma...

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  18. Three nicols prisms are placed such that, first and third are mutually...

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  19. Polarized light of intensity I(0) is incident on a pair of Polaroid sh...

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