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Chapter 32: Problem 32

What is the speed of light in crown glass, whose index of refraction is \(1.52 ?\)

Short Answer

Expert verified
Answer: The speed of light in crown glass is approximately \(1.97 \times 10^8 m/s\).

Step by step solution

01

Remember the speed of light in vacuum

The speed of light in vacuum is \(c = 3 \times 10^8 m/s\).
02

Write down the index of refraction

The index of refraction for crown glass, \(n\), is given as \(1.52\).
03

Apply the formula to find the speed of light in crown glass

Use the formula \(v = \frac{c}{n}\) to find the speed of light in crown glass. Plug in the given values: \(v = \frac{3 \times 10^8 m/s}{1.52}\).
04

Calculate the speed of light in crown glass

Divide \(3 \times 10^8 m/s\) by \(1.52\): \(v \approx 1.97 \times 10^8 m/s\).
05

State the answer

The speed of light in crown glass is approximately \(1.97 \times 10^8 m/s\).

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Most popular questions from this chapter

Among the instruments Apollo astronauts left on the Moon were reflectors used to bounce laser beams back to Earth. These made it possible to measure the distance from the Earth to the Moon with unprecedented precision (uncertainties of a few centimeters out of \(384,000 \mathrm{~km}\) ), for the study both of celestial mechanics and of plate tectonics on Earth. The reflectors consisted not of ordinary mirrors, but of arrays of corner cubes, each consisting of three square plane mirrors fixed perpendicular to each other, as adjacent faces of a cube. Why? Explain the function and advantages of this design.

Suppose your height is \(2.0 \mathrm{~m}\) and you are standing \(50 \mathrm{~cm}\) in front of a plane mirror. a) What is the image distance? b) What is the image height? c) Is the image inverted or upright? d) Is the image real or virtual?

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