A Metallic Sheet Has a Large Number of Parallel Slits,5

question 50

Multiple Choice

A metallic sheet has a large number of parallel slits,5.0 mm wide and 20 cm apart.This sheet is used as a diffraction grating for microwaves.A wide parallel beam of microwaves is incident normally on the sheet.What is the smallest microwave frequency for which only the central maximum will occur? (c = 3.00 × 10⁸ m/s)

• A)0.50 GHz
• B)0.70 GHz
• C)1.0 GHz
• D)1.5 GHz
• E)2.0 GHz

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Definitions:

Base Class

In object-oriented programming, a class from which other classes inherit methods and properties.

Abstract Method

A method in Java that is declared without an implementation, intended to be overridden by subclasses.

Clone Method

A method in Java that creates a new instance of the class of the current object and copies all the fields to the new instance.

Clone Method

A method in object-oriented programming that creates and returns a copy of an object.