Lesson: Colors of Light Physics • 9th Grade
In this lesson, we will learn how to describe the reflection, transmission, absorption of light of different colors, and the relation between colors and light wavelengths.
An object is struck by a beam of white light containing all the colors of the visible spectrum, as shown in the diagram. Some colors are reflected from the object, some are transmitted through the object, and some are absorbed by the object. Assume that all the colors of light in the beam contain the same amount of energy as each other.
What percentage of the energy in the incident light ray does the object reflect? Answer to one decimal place.
What percentage of the energy in the incident light ray does the object absorb? Answer to one decimal place.
What color will an object that emits only red, orange, and yellow light appear if viewed through the shown object?
What color will an object that emits only red, orange, and yellow light appear if viewed reflected from the object?
A light ray that strikes an object is partly reflected and partly transmitted, as shown in the diagram. What percentage of the light ray’s energy is absorbed by the object?
What color is a beam of originally white light after the beam is transmitted through object B and then reflected from object A?