Homework Help

What is the nature of white light? Why does red or blue paper appear red or blue? What...

user profile pic

cooldude47236 | Student, Grade 10 | (Level 1) Honors

Posted March 6, 2011 at 3:02 AM via web

dislike 0 like

What is the nature of white light? Why does red or blue paper appear red or blue? What colors of visible light does a black object reflect and absorb?

1 Answer | Add Yours

user profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted March 6, 2011 at 3:27 AM (Answer #1)

dislike 0 like

White light consists of all the frequencies of electromagnetic radiation that are visible to us. In other words, white light is made up of all the colors of light. Objects that appear white do not absorb light of any color. Light of any color that falls on them is reflected back.

An object that has any other color absorbs light of all colors except its own color. For example a red object absorbs light of all colors except red; similarly, a blue object reflects only blue light, all the other colors are absorbed by it.

A black object appears black because it absorbs light of all colors that fall on it. Light of none of the colors falling on an ideal black object is reflected back by it.

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes