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Chapter 27: Problem 31

Of the following colors, identify the color associated with the shortest wavelength. a. red b. yellow c. green d. blue

Short Answer

Expert verified
d. blue

Step by step solution

01

Understand the problem

Identify the color among the given options that is associated with the shortest wavelength.
02

Recall the visible spectrum order

The visible spectrum of light ranges from red, which has the longest wavelength, to violet, which has the shortest wavelength. The order from longest to shortest is: red, orange, yellow, green, blue, indigo, violet.
03

Compare the given colors

Of the colors provided (red, yellow, green, blue), blue is the closest to violet, which means it has the shortest wavelength among them.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

wavelengths of light
Light travels in waves, similar to the ripples you see in water. The distance between two consecutive crests (or peaks) of these waves is called the 'wavelength'.
Light wavelengths are measured in nanometers (nm). One nanometer is one billionth of a meter!
Different colors of light have different wavelengths. These wavelengths determine the color that we see.
Shorter wavelengths mean higher energy, and these stay at the violet end of the spectrum. Longer wavelengths have lower energy and appear red.
  • Red light: ~700 nm
  • Yellow light: ~580 nm
  • Green light: ~530 nm
  • Blue light: ~470 nm
The list above helps visualize how wavelengths align with each color. Understanding these numbers is key to identifying wavelength-based questions.
visible spectrum
The visible spectrum is the range of wavelengths that the human eye can see.
This spectrum includes all the colors from red to violet.
Imagine a rainbow. The range of colors seen in a rainbow forms the visible spectrum.
The sequence always remains in a specific order because light waves with different wavelengths refract (bend) differently.
This breaks the light into a range of colors, from red (which bends the least) to violet (which bends the most).
In short, the visible spectrum ranges from about 400 nm (violet) to 700 nm (red).
  • Red - longest wavelength (700 nm)
  • Orange - (620-590 nm)
  • Yellow - (590-570 nm)
  • Green - (570-495 nm)
  • Blue - (495-450 nm)
  • Indigo - (450-425 nm)
  • Violet - shortest wavelength (400-425 nm)
Knowing this order helps in many areas like science and art.
color wavelengths
Colors are simply different wavelengths of light that our eyes can detect.
When light hits an object, some wavelengths are absorbed, and others are reflected.
The color of an object is determined by the wavelengths it reflects. For instance, an orange looks orange because it reflects the orange wavelength and absorbs other wavelengths.
Colors closer to red have longer wavelengths and are less energetic.
Colors closer to violet have shorter wavelengths and are more energetic.
For example:
  • Red: ~700 nm (longest)
  • Yellow: ~580 nm
  • Green: ~530 nm
  • Blue: ~470 nm (shortest, among the options of the exercise)
This is why, in the exercise, blue light is identified as having the shortest wavelength among the provided color options.

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Most popular questions from this chapter

Explain how being on the moon, which has less gravity than Earth, might affect vestibular sensation and why. a. Vestibular sensation relies on gravity鈥檚 effects on tiny crystals in the inner nostril; therefore, reduced gravity on the moon would likely impair vestibular sensation. b. Vestibular sensation relies on gravity鈥檚 effects on huge crystals in the inner ear; therefore, reduced gravity on the moon would likely impair vestibular sensation. c. Vestibular sensation relies on gravity鈥檚 effects on tiny crystals in the inner ear; therefore, reduced gravity on the moon would likely impair vestibular sensation. d. Vestibular sensation relies on gravity鈥檚 effects on tiny crystals in the outer ear; therefore, reduced gravity on the moon would likely impair vestibular sensation.

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