What is a radio telescope?

• An astronomical instrument designed to detect radio frequency emissions from celestial sources.

• A type of optical telescope.

• A device used for measuring temperature in space.

What are the uses of radio telescopes?

• To detect radio waves from space.

• To observe planets.

• To measure the distance of stars.

Why are radio telescopes important in astronomy?

• They reveal phenomena that are invisible to optical telescopes.

• They are cheaper than optical telescopes.

• They can be used during the day.

The processes in radio telescope involveds the following except_.

• Gathering Radio Waves

• Data Analysis

• Reflecting Radio Waves

• Radio Interferometry

The following is an example of space telescope except_.

• James Webb' telescope

• Galileian telescope

• Hubble telescope

What type of telescope did Chester Hall invented in 1733?

• apochromatic telescope

• Galileian telescope

• Hubble telescope

• acromatic telescope

What type of lens used by an apochromatic telescope?

• convex

• concave

• achromatic lens

• apochromatic telescope

What are the 2 types of Optical Telescope?

This detects the most distant objects in the universe, searches for massive planets and studies the evolution of clusters of galaxies.

James Gregory published a book "Optica Promota" in _.

• 1609

• 1163

• 1663

• 1608