The Methods of Observation and Data Collection in Modern India

Optical telescopes are the most widely used type of telescope in modern Indian astronomy. They collect visible light from celestial objects and focus it to form an image.

The Schmidt telescope is a type of catadioptric telescope, which means that it uses both lenses and mirrors to focus light. It is not a type of optical telescope.

The Giant Metrewave Radio Telescope (GMRT) is the largest optical telescope in India. It is located near Pune, Maharashtra.

A phased array radio telescope is a type of radar, not a radio telescope.

The Giant Metrewave Radio Telescope (GMRT) is the largest radio telescope in India. It is located near Pune, Maharashtra.

There is no such thing as a non-focusing X-ray telescope.

There is no X-ray telescope in India.

There is no such thing as a Schmidt infrared telescope.

The Vainu Bappu Observatory (VBO) is the largest infrared telescope in India. It is located near Kavalur, Tamil Nadu.

CCD cameras are the primary method of data collection used in modern Indian astronomy. They are electronic devices that convert light into an electrical signal.

Active pixel sensor CCD cameras are not a type of CCD camera.

There is no single largest CCD camera in India. The size of a CCD camera depends on the specific telescope it is used with.

There is no such thing as a plastic photographic plate.

There is no single largest photographic plate used in India. The size of a photographic plate depends on the specific telescope it is used with.

All of the options are types of spectrometers.

There is no single largest spectrometer in India. The size of a spectrometer depends on the specific telescope it is used with.

Imaging radiometers are not a type of radiometer.

There is no single largest radiometer in India. The size of a radiometer depends on the specific telescope it is used with.