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Question: 1 / 460

Which of the following best describes a reflecting telescope?

A telescope that uses a lens to focus light

A telescope that uses a large concave mirror

A reflecting telescope is best described by its use of mirrors, specifically a large concave mirror, to gather and focus light. This design allows for the construction of larger apertures compared to refracting telescopes that use lenses. The concave mirror collects incoming light and reflects it towards a focal point, where an eyepiece can be positioned to magnify the image. This method significantly reduces optical aberrations and allows for a clearer and more detailed view of celestial objects.

In contrast, options that mention lenses pertain to refracting telescopes, while the reference to radio waves relates to radio telescopes, which utilize different technology entirely. Lastly, the mention of a simple device without optics does not accurately represent the complexity and functionality of a reflecting telescope.

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A telescope designed for observing radio waves

A simple device that requires no optics

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