A Light Beam Shines Through a Thin Slit and Illuminates

question 45

Multiple Choice

A light beam shines through a thin slit and illuminates a distant screen.The central bright fringe on the screen is 1.00 cm wide,as measured between the dark fringes that border it on either side.Which of the following actions would decrease the width of the central bright fringe? (There may be more than one correct choice.)

• A) increase the wavelength of the light
• B) decrease the wavelength of the light
• C) increase the width of the slit
• D) decrease the width of the slit
• E) put the apparatus all under water

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