Diffraction Grating: a Metallic Sheet Has a Large Number of Slits

question 73

Multiple Choice

Diffraction grating: A metallic sheet has a large number of slits, 5.0 mm wide and 20 cm apart, and 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 occurs? (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:

Afterimages

Visual sensations that remain after a stimulus is withdrawn, often in complementary colors.

Optic Chiasm

A crucial anatomical point in the brain where the optic nerves from each eye cross, significantly involved in the visual processing system.

Involuntary Eye Movements

Movements of the eye that are not controlled by the individual, often reflexive responses to stimuli or part of the body's normal physiological function.

Optic Chiasm

is the X-shaped structure located in the brain where the optic nerves partially cross, crucial for visual processing.