Focus

Definition

The point at which light rays meet to produce a sharp image.

Used by OCR

Specification B3.1e · Paper 1 (Foundation), Paper 3 (Higher)

A corrective lens changes the path of the rays before they enter the eye so that the eye can focus them in the correct place.
Revise: Eye defects

1
Link each focusing defect in a three-part chain: where the rays would focus, why they focus there, and which lens moves the focus onto the retina.

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GCSE Biology · key term

The point at which light rays meet to produce a sharp image.

Used by OCR

Specification B3.1e · Paper 1 (Foundation), Paper 3 (Higher)

A corrective lens changes the path of the rays before they enter the eye so that the eye can focus them in the correct place.
Revise: Eye defects

1
Link each focusing defect in a three-part chain: where the rays would focus, why they focus there, and which lens moves the focus onto the retina.

Create a free account to read GCSE Biology revision notes for your exam board and track your progress.