When Certain Light Rays Pass from a Vacuum into a Block

question 59

Multiple Choice

When certain light rays pass from a vacuum into a block of an unknown material,the measured index of refraction of the material is 3.00.What is the speed of light inside the block?

• A)9.9 × 10⁶ m/s
• B)4.8 × 10⁷ m/s
• C)1.0 × 10⁸ m/s
• D)1.9 × 10⁸ m/s
• E)2.9 × 10⁸ m/s

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Definitions:

Pacemaker Potential

Pacemaker potential refers to the spontaneous gradual depolarization of the membrane potential in pacemaker cells, leading to the initiation of action potentials in certain heart cells.

SA Node

The sinoatrial node, often described as the heart's natural pacemaker, initiating the electrical impulses that set the pace for cardiac rhythm.

Voltage-gated

Refers to ion channels that open or close in response to changes in electrical potential across a cell's membrane.

Intercalated Discs

Specialized connections between heart muscle cells (cardiomyocytes) that facilitate coordinated contraction.