An astronomical telescope is said to be in normal adjustment when the

Assessment: JAMB UTME - Physics - 1999 Subject: Physics

Question 1 Report

An astronomical telescope is said to be in normal adjustment when the
Answer Details
An astronomical telescope is said to be in normal adjustment when the final image is at infinity. In an astronomical telescope, the objective lens forms a real image of the object at its focus which is farther from the objective lens. The eyepiece is then used as a magnifying glass to form a virtual image of the real image, which is closer to the eye. When the virtual image is formed at infinity, the eye is relaxed, and the eye lens is effectively at its focal length, allowing for maximum sharpness and clarity.
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