Larger than A1 in size - The Atomic Structure Wall Chart is ideal for your chemistry lessons. Suitable from GCSE to A-Level, it is colourful, concise and outlines the key concepts of this topic. Purchase it for your classroom from only £5
HOW APERTURE WORKS: When an object is in focus, light rays originating from that point converge at a point on the camera's sensor. If the light rays hit the sensor at slightly different locations (arriving at a disc instead of a point), then this object will be rendered as out of focus -- and increasingly so depending on how far apart the light rays are. The lens with the larger aperture therefore has a smaller distance range over which objects reaching the sensor will remain in focus.