## Human eye-MCQ-Basic

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Human eye. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. Near and far points of human eye are

•  25 cm and infinite
•  50 cm and 100 cm
•  25 cm and 50 cm
•  0 cm and 25 cm

25 cm and infinite

Q2. A defective eye cannot see close objects clearly because their image is formed

•  On the eye lens
•  Between eye lens and retina
•  On the retina
•  Beyond retina

Beyond retina

Q3. Retina of eye acts like ..... of camera

•  Shutter
•  Film
•  Lens
•  None of these

Film

Q4. A person who can see things most clearly at a distance of 10 cm. Requires spectacles to enable him to see clearly things at a distance of 30 cm. What should be the focal length of the spectacles

•  15 cm (concave)
•  15 cm (convex)
•  10 cm
•  0

15 cm (concave)

Q5. An astronaut is looking down on earth's surface from a space shuttle at an altitude of 400 km . Assuming that the astronaut's pupil diameter is 5 mm and the wavelength of visible light is 500 nm . The astronaut will be able to resolve linear object of the size of about

•  0.5 m
•  5 m
•  50 m
•  500 m

50 m

Q6. A person uses a lens of power + 3D to normalise vision. Near point of hypermetropic eye is

•  1 m
•  1.66 m
•  2 m
•  0.66 m

1 m

Q7. The separation between two microscopic particles is measured P A and P B by two different lights of wavelength 2000 Ã… and 3000 Ã… respectively, then

•  P A > P B
•  P A < P B
•  P A < 3/2 P B
•  P A = P B
P A < P B

Q8. To remove myopia (short sightedness) a lens of power 0.66 D is required. The distant point of the eye is approximately

•  100 cm
•  150 cm
•  50 cm
•  25 cm

150 cm

Q9. A person suffering from ‘presbyopia’ should use

•  A concave lens
•  A convex lens
•  A bifocal lens whose lower portion is convex
•  A bifocal lens whose upper portion is convex

A bifocal lens whose lower portion is convex

Q10. A person uses spectacles of power + 2D. He is suffering from

•  Short sightedness or myopia
•  Long sightedness or hypermetropia
•  Presbyopia
•  Astigmatism

Long sightedness or hypermetropia

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