Electrons Emerge from an Electron Gun with a Speed of 2.0

question 46

Multiple Choice

Electrons emerge from an electron gun with a speed of 2.0 × 10⁶ m/s.They are made to pass through a double-slit apparatus.Interference fringes with spacing of 2.7 mm are detected on a screen far from the double slit.What would the fringe spacing be if the electrons were replaced by neutrons with the same speed?

• A)1.5 μm
• B)4.9 m
• C)0.93 nm
• D)1.2 km

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Definitions:

Milliliter

A metric unit of volume equal to one-thousandth of a liter, commonly used to measure liquids.

Thousandth

A unit or measure representing one part in a thousand of something.

Liter

A metric unit of volume equal to 1000 cubic centimeters or approximately 0.26 U.S. gallons.

Root

The section of a plant that is usually found beneath the soil, responsible for absorbing water and nutrients.