To block out the rest of sunlight, a sun shield has been attached behind it. It’s nearly as big as a tennis court. Do you know what is the focal length of this telescope? Those of you who use DSLR Cameras as a hobby would know the lens of those cameras usually has the focal length somewhere around 24mm, 35mm or 50mm. The focal length of the James Webb Space Telescope is more than 2,500 times of it. 131.4 meters. Meters, not mm. It’s main mirror weighs around 705 kg.
Before this, let me remind you that this is our Electromagnetic Spectrum, Different EM waves have different wavelengths. In it, there is a tiny spectrum of visible light. The light which we can see with our naked eyes. The rainbow colors. Violet, Indigo, Blue, Green, Yellow, Orange, and Red. This wavelength ranges from 0.38 to 0.7 micrometer.
Wavelengths higher than red, are known as infrared. And the wavelength on which this James Webb Space Telescope can take pictures in ranges from 0.6 to 28 micrometers. There is a small overlap with the visible light, but mainly, this telescope works with the infrared portion.
