Post-UTME Physics 2018 Objective — Question 7
Question 7 of 20 from the Post-UTME Screening (Post-UTME) Physics 2018 Objective paper, with the correct answer and a full explanation.
Advertisement
Which condition must be fulfilled in order to obtain a sharp image of an object placed in front of a pin-hole camera?
- A. The pin-hole should be as small as possible.Correct
- B. The size of the camera should be as large as possible
- C. The light entering the camera should be a parallel beam.
- D. The object should be as far from the pin-hole as possible
Explanation
A smaller pinhole produces a sharper (though dimmer) image by limiting the spread of light rays.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.