The Big Bang, red-shift and the expanding Universe

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Question 37
Easy

Cosmic Microwave Background (CMB) radiation provides evidence that the Universe has evolved from a hot, dense beginning.

Table 1

Type of radiationTypical wavelength
Gamma rays2.0 × 10-13 m
X-rays5.0 × 10-11 m
Ultraviolet250 nm250 \text{ nm}250 nm
Visible500 nm500 \text{ nm}500 nm
Infrared6.5 μm6.5 \ \mu\text{m}6.5 μm
Microwaves2.5 mm
Radio waves80 m

Use the data in Table 1 to give a typical value for the wavelength of CMB radiation.

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The Big Bang, red-shift and the expanding Universe Questions

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