| A | B |
|---|
| Yellow | Red and Green light mixed together |
| Red | Red object viewed under a red light will appear this colour |
| Convex Lens | Bulged out at the middle as compared to the ends |
| Convex Mirror | Has negative focal length |
| Virtual Image | Always Upright |
| Real Image | Can be projected on a screen |
| Spherical Aberration | All rays of light do not reach focal point |
| Chromatic Aberration | Different Colours reach different focal points, causing blurring |
| Retina | The "Screen" at the back of the eye where the image falls |
| Cone Cells | The part of the eye that detects colour |
| Optic Nerve | Carries the signal to the brain |
| Pupil | The black spot in the centre of the eye |
| Nearsightedness | defect of the eye, corrected with convex lenses |
| colourblindness | A problem with the cone cells in the eye |
| Ciliary Muscles | These control the shape of the lens in the eye |
| Black | Mixing the primary pigments will result in this colour |
