Bright and Dark Fringes Are Seen on a Screen When

question 8

Multiple Choice

Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. The number of fringes per unit length on the screen can be doubled

• A) if the distance between the slits is doubled.
• B) if the wavelength is changed to .
• C) if the distance between the slits is quadruple the original distance and the wavelength is changed to .
• D) if any of the above occurs.
• E) only if the width of the slits is changed to .

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