A Metallic Sheet Has a Large Number of Parallel Slits $5.0 \mathrm {~mm}$

question 120

Multiple Choice

A metallic sheet has a large number of parallel slits, $5.0 \mathrm {~mm}$ wide and $20 \mathrm {~cm}$ apart. This sheet is used as a diffraction grating for microwaves. A wide parallel beam of microwaves is incident normally on the sheet. If the microwave wavelength is $6.0 \mathrm {~cm}$ , what is the largest angle from the normal, at which an intensity maximum occurs?

• A) \(84 ^ { \circ }\)
• B) \(64 ^ { \circ }\)
• C) \(69 ^ { \circ }\)
• D) \(79 ^ { \circ }\)
• E) \(74 ^ { \circ }\)

---

Definitions:

Carotid Baroreceptors

Sensory nerve endings located in the carotid artery that detect changes in blood pressure and help regulate it.

Glossopharyngeal Nerve

The ninth cranial nerve, responsible for sensory and motor functions in the throat and back of the tongue.

Sympathetic Nerve

The sympathetic nervous system is part of the autonomic nervous system that prepares the body for 'fight or flight' responses during perceived threats.

Carotid Baroreceptors

Sensors located in the carotid arteries that monitor blood pressure and relay information to the central nervous system to maintain stable blood pressure.