Optical Instruments Practice
10 problems · instant feedback · full explanations
Instruments extend the eye: microscopes magnify the tiny, telescopes gather the faint. Magnification and light-gathering are the two currencies.
Q1.
A compound microscope magnifies using:
Multiple choice · Easy
Q2.
A telescope has objective f = 1000 mm and eyepiece f = 20 mm. What is the angular magnification?
Numerical answer (×) · Medium
Q3.
Which part of the eye controls how much light enters?
Multiple choice · Easy
Q4.
A 20 cm telescope gathers how many times more light than a 5 cm one?
Numerical answer (×) · Medium
Q5.
Which camera aperture admits the most light?
Multiple choice · Easy
Q6.
A microscope has 40× objective and 10× eyepiece. What is the total magnification?
Numerical answer (×) · Hard
Q7.
The eye's rods are more light-sensitive than its cones.
True / False · Easy
Q8.
Reflecting telescopes suffer from chromatic aberration.
True / False · Medium
Q9.
Nearsightedness is corrected with what kind of lens?
Multiple choice · Hard
Q10.
The human eye focuses on near objects by:
Multiple choice · Hard