WAEC Physics 2021 Theory — Question 19
Question 19 of 35 from the West African Examinations Council (WAEC) Physics 2021 Theory paper, with the correct answer and a full explanation.
Advertisement
10(a)(i). Define each of the following terms as it relates to converging lenses: I. focal length; II. optical centre.
Model answer
I. Focal length: the distance between the optical centre of the lens and its principal focus. II. Optical centre: the point through the lens through which light rays pass undeviated (the geometric centre of the lens).
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.