Refractive index

Refractive index

Assessment

Interactive Video

Science, Physics

6th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

The video explains the concept of refractive index, which is the ratio of the speed of light in a vacuum to its speed in a given medium. It uses the example of glass with a refractive index of 1.5, indicating that light travels 1.5 times faster in a vacuum than in glass.

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5 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a medium in the context of light speed?

A vacuum where light travels fastest

A type of glass with a refractive index

A substance that allows light to travel through it

A device that measures light speed

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the speed of light in a medium defined?

As the ratio of the speed of light in a vacuum to its speed in the medium

As the speed of light in the medium

As the speed of light in a vacuum

As the speed of sound in the medium

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a refractive index of 1.5 for glass indicate?

Light does not travel through glass

Light travels at the same speed in glass and in a vacuum

Light travels 1.5 times slower in glass than in a vacuum

Light travels 1.5 times faster in glass than in a vacuum

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the refractive index of a medium is greater than 1, what does it imply?

Light travels faster in the medium than in a vacuum

Light cannot travel through the medium

Light travels slower in the medium than in a vacuum

Light travels at the same speed in both

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is true about light speed in a vacuum compared to a medium with a refractive index?

Light speed is faster in the medium

Light speed is faster in a vacuum

Light cannot travel in a vacuum

Light speed is the same in both

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