Consider the following statements about the James Webb Space Telescope (JWST): 1. It observes in the near-infrared and mid-infrared spectrum. 2. It is positioned at the Sun-Earth Lagrange Point L2. 3. It carries a coronagraph for exoplanet detection. Which of the above statements is/are correct?
All 1, 2 and 3
Statement 1 – Correct: JWST is optimised for near-infrared (via NIRCam, NIRSpec, NIRISS) and mid-infrared (via MIRI) observations, allowing it to peer through dust and study the most distant, redshifted galaxies.
Statement 2 – Correct: The telescope orbits the Sun-Earth L2 Lagrange point, about 1.5 million km from Earth. This position keeps the Sun, Earth and Moon on the same side, allowing its sunshield to keep the optics extremely cold.
Statement 3 – Correct: Both NIRCam and MIRI carry coronagraphs that block starlight to enable direct imaging and characterisation of exoplanets near their host stars.
Hence all three statements are correct.
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