Q

What is the distance between the principal focus and optical centre of a lens called?

RRB Group-D 07/12/2018 / Shift-III 2018
✓ Answer: C Focal length
Focal length is the distance between the optical centre and principal focus.
← Previous Question Next Question →

📚 Related Questions — Light

1 Which statement is true? 2 A fine beam becomes visible in a smoke-filled room due to: 3 Which phenomenon forms images in mirrors? 4 An object is 36 cm in front of a concave mirror of… 5 Which phenomenon results from atmospheric refraction? 6 What can divide sunlight into its constituent colours?