Question 10 of 29beginner🧠 RememberVery Short1 mark
Define 1 dioptre of power of a lens.
Correct Answer
1 dioptre is the power of a lens whose focal length is 1 metre. It is denoted by the letter D.
Exercise: QUESTIONS | Q: 1 | (Page Page 25)
For More Understanding
Explanation
The textbook clearly defines 1 dioptre as the power of a lens with a focal length of 1 metre. The SI unit of power of a lens is dioptre, represented by D. The relation 1D = 1m⁻¹ shows that when focal length is expressed in metres, power is expressed in dioptres.