Sci-Five | The Hindu Science Quiz: on James Webb Space Telescope

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. The James Webb Space Telescope recently sent back images of different parts of the cosmos. What was the part of the light spectrum used by the cameras onboard the JWST?

Ultraviolet

The JWST has cameras onboard that are sensitive to light in the range of approximately 0.6 micrometres to 27 micrometres.

Visible light

The JWST has cameras onboard that are sensitive to light in the range of approximately 0.6 micrometres to 27 micrometres.

Infrared

The JWST has cameras onboard that are sensitive to light in the range of approximately 0.6 micrometres to 27 micrometres.

Radio waves

The JWST has cameras onboard that are sensitive to light in the range of approximately 0.6 micrometres to 27 micrometres.

. What is the metal most commonly used to create a reflecting surface in liquid mirror telescopes?

Thallium

Most recently the International Liquid Mirror Telescope Set up in Devasthal near Nainital has used about 700 kg of mercury which is rotated to get a paraboloid reflecting surface. 

Gallium

Most recently the International Liquid Mirror Telescope Set up in Devasthal near Nainital has used about 700 kg of mercury which is rotated to get a paraboloid reflecting surface. 

Mercury

Most recently the International Liquid Mirror Telescope Set up in Devasthal near Nainital has used about 700 kg of mercury which is rotated to get a paraboloid reflecting surface. 

Silver

Most recently the International Liquid Mirror Telescope Set up in Devasthal near Nainital has used about 700 kg of mercury which is rotated to get a paraboloid reflecting surface.