What Color Does a Blue Book Appear Under Monochromatic Red Light?

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Discussion Overview

The discussion revolves around the appearance of a blue book when illuminated by monochromatic red light. Participants explore the implications of color perception under specific lighting conditions, considering both theoretical and practical aspects.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • One participant suggests that the blue book will appear black under monochromatic red light, as it absorbs all red wavelengths.
  • Another participant agrees with the first claim but notes that there are many shades of blue, some of which may contain red, potentially affecting the outcome.
  • A third participant adds that the book would only appear black if its reflection coefficient at the red wavelength is precisely zero, emphasizing the role of the reflection spectrum in determining appearance.
  • One participant hints that the question resembles a homework problem, suggesting a context of academic inquiry.

Areas of Agreement / Disagreement

Participants express differing views on the appearance of the blue book, with some agreeing on the black appearance while others raise considerations about the nuances of color and reflection. The discussion remains unresolved regarding the exact outcome.

Contextual Notes

There are assumptions about the ideal conditions for color perception and the specific properties of the blue book that are not fully explored. The discussion does not clarify the exact shades of blue or their reflection characteristics.

nami habib
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in monochromatic red light a blue book will appear?

A)black
B)red
C)purple
D)blue
 
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black. the blue book absorbs all the red, leaving nothing to be reflected to the eyes.
 
In the ideal circumstance, Bloodthunder is right. But of course, there are infinite shades of blue. Many blues contain a lot of red.
 
Technically, it would only appear black if the reflection coefficient at said wavelength is precisely zero.

The apparent spectrum (as visible to an observer) is the incident light times the reflection spectrum.

P.S. Sounds like a homework question.

Claude.
 

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