Changing the wavelength of visible light changes its color. If the wavelength is

Question

Changing the wavelength of visible light changes its color. If the wavelength is decreased or increased outside of the range of wavelengths our eyes can detect, the light becomes invisible to us, but it is still fundamentally light. Examine the figure, which shows the entire electromagnetic spectrum and includes all types of light as a function of wavelength.

Given what you learned from the figure, rank these types of light in order of increasing energy.

(Drag and drop into the appropriate area)

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Ultraviolet

1

Radio

2

Green

3

Orange

4

Infrared

5

Frequency (Hz) 3 1020 3 1018 3 1016 3 1014 3 1012 3 1010 3 108 3 10 Gamma rays Mic crowa Television X- Infrared FM Radio AM 0-12 10-11 10-10 109 00-70 105 04 0o 02 0 1 Wavelength (m) 10 102 10* 0.001 nm 0.01 nm 0.1 nm 1nm 10nm 100 nm 11pm 10m 100 m 1mm 1cm 10cm 1m 10m 100 m 1km Visible 350 400 500 Wavelength (nm) 600 700

Explanation / Answer

in general energy of light can be calculated from the Planck's formula which is , E=h*f

h: planck's constant and f: frequency

when frequency is highest as the gamma rays have (minimum wavelength as learnt from the figure above) the energy of light would be maximum . also from the above figure we learnt that wavelength of radio waves is maximum so it will be on the least energy level.since energy inversely proportional to wavelength. so these types of light in order of increasing energy will be:

from lowest to highest energy:

1) radio waves

2) microwaves

3) infrared

4) ultraviolet light

5) X-ray

6) gamma rays.

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