Plane wavefront of light of wavelength 5500 A° is incident on two slits in a screen perpendicular to the direction of light rays. Separation of 10 bright fringes is 2 cm.
To find:
Distance between slits ?
Calculation:
Total separation of 10 bright fringes = 2 cm, so seperation is 2 adjacent fringes = 2/10 = 0.2 cm.
Answers & Comments
Given:
Plane wavefront of light of wavelength 5500 A° is incident on two slits in a screen perpendicular to the direction of light rays. Separation of 10 bright fringes is 2 cm.
To find:
Distance between slits ?
Calculation:
Total separation of 10 bright fringes = 2 cm, so seperation is 2 adjacent fringes = 2/10 = 0.2 cm.
So, our fringe width = = 0.2 cm.
Now, let distance between slits be d :
So, distance between slits is 0.55 mm.
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