Tag: option c: imaging

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Questions Related to option c: imaging

Multiple choice physics option c: imaging xx radio telescope and space telescopes optical instruments : telescope

The focal length of objective and eye-piece of a telescope are $200\ cm$ and $5\ cm$ respectively. Final image is formed at least distance of distinct vision. The magnification of telescope is

  1. $20$
  2. $24$
  3. $30$
  4. $48$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

For a telescope where the final image is at the least distance of distinct vision (D = 25 cm), the magnification M = f_o / f_e * (1 + f_e / D). Plugging in f_o = 200, f_e = 5, and D = 25 gives M = (200/5) * (1 + 5/25) = 40 * 1.2 = 48.

Multiple choice physics option c: imaging human eye and its working what is inside our eyes? human eye and defects of vision

The whitish part of eye mainly:

  1. provides characteristic colour to the eye

  2. acts as protective layer for the eye

  3. regulates the amount of light entering into the eye

  4. perceives the sensations
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Whitish part of eye is tough so that it can protect the eye from injuries.

It is white and transparent coat, known as cornea.