In a telescope, the term objective refers to the lens or mirror that first ...

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Explore Alberta's Grade 8 Science curriculum on Light and Optical Systems. Test your knowledge with engaging quizzes including flashcards and multiple choice questions. Prepare effectively for your exam!

Multiple Choice

In a telescope, the term objective refers to the lens or mirror that first ...

Explanation:
The objective is the lens or mirror that collects light from a distant object and forms the first image. This initial image is created at the telescope’s focal plane, and it’s the eyepiece that magnifies that image for us to see. The objective doesn’t filter light or display the final image; filtering would be an accessory, and displaying the final image happens when we view it through the eyepiece or a camera. So the essential role is to gather light and form the initial image.

The objective is the lens or mirror that collects light from a distant object and forms the first image. This initial image is created at the telescope’s focal plane, and it’s the eyepiece that magnifies that image for us to see. The objective doesn’t filter light or display the final image; filtering would be an accessory, and displaying the final image happens when we view it through the eyepiece or a camera. So the essential role is to gather light and form the initial image.

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