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(a) How long does it take light to travel through a 4.0 mm thick piece of window glass? (b)...

The refractive index of window glass varies between 1.4 and 1.6. We assume {eq}n_G = 1.5 = \frac{3}{2} {/eq}. The speed at which light travels through glass is therefore two-thirds of the speed in vac... read more

Curious Kids: how does heat travel through space if space is a vacuum?

How does heat travel through space if space ... Energy is radiated from the sun, through the vacuum of space at the speed of light. When this energy arrives at Earth, some of it is transferred ... read more

Faster-than-light travel: Are we there yet?

By jumping through hyperspace, of course, as Asimov himself explains in Foundation: Travel through ordinary ... speed limit is the speed of light in a vacuum. Light slows down when it moves through a ... read more

How does Temperature affect Refraction of Water? EE Rough Draft

How does a change in the temperature of water change its ... This is due to the fact that the more dense a material is, the more molecules the light wave must travel through, decreasing the wave’s vel... read more

What is the Speed of Light in MPH?

How Fast does Light Travel Through Other Surfaces? The speed of light is less than “c” or the defined constant that travels through a vacuum when it travels through air or other materials such as glas... read more

Spinning glass ball rejects light from one direction

The point is that the sound will travel around the walls through a series of grazing reflections without passing through the center space of the cathedral. Light does the same thing in one of these li... read more

The Airline Industry’s Glass Ceiling Is Still Sky-High: A Skift Deep Dive

In this deep dive, women on the commercial side of aviation share how it feels to hit the glass ceiling in 2019, and occasionally break through. Of all the sectors in travel, aviation has one of ... read more

The Best Drip Coffee Makers on Amazon, According to Hyperenthusiastic Reviewers

It does not turn on or off by itself, but again, I truly don’t need help with pushing one little button. I see the green light when it ... fact that there is no glass carafe to accidentally ... read more

How Does Light Travel Through Glass?

I've mentioned before that I'm answering the occasional question over at the Physics Stack Exchange site, a crowd-sourced physics Q&A. When I'm particularly pleased with a question and answer, I'll be ... read more

Faster-than-light travel: are we there yet?

Did he know something about a secret theory of faster-than-light travel? Hardly. Asimov was participating ... Light slows down when it moves through a material like water or glass, and then it’s perfe... read more