Chapter U5.113, Problem 4E

Interpretation Introduction

Interpretation:

The color that will appear when blue light is passed through the thin blue plastic sheet needs to be determined.

Concept introduction:

Brain and human eye together are used to translate light into different color. In the eye, receptors of light convey the messages into the brain. As per Newton, color does not exist in the objects, preferably object’s surface reflects some colors and all other colours are absorbed. Human eye only percieve the colors which are reflected.

Answer to Problem 4E

Blue.

Explanation of Solution

White light is a mixture of all the colorsin equal proportions. So, objects which are white looks white since all the light’s visible wavelength are reflected back which falls on them.On the contrary, on the object which are colored, only some of the wavelengths are reflected back, and the rest of the color is absorbed.

So, when blue light is permitted byblue object having blue filter, it will still reflect blue light and thus it will appear as blue.