Multiple choice

In an astronomical telescope, the final image for normal adjustment is formed at

  1. the least distance of distinct vision

  2. the focus of objective lens

  3. focus of the eye lens

  4. infinity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In normal adjustment, the eyepiece is positioned so the objective's image falls at its focal point, producing parallel rays that the relaxed eye can focus. This means the final virtual image appears at infinity, allowing comfortable viewing without eye strain.

Keep practicing — related questions