lens. 1  a piece of glass, or other transparent substance, with two curved surfaces, or one plane and one curved, regularly bringing together or spreading rays of light passing through it: a lens or combination of lenses is used in optical instruments, eyeglasses, etc. to form an image.ens-Computer Definition. The glass or plastic elements that focus light onto analog film or a digital sensor in a still or video camera. Lens quality is just as important in digital cameras as it was in the Daguerreotype cameras in the 1800s.
The FitnessGram Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. [beep] A single lap should be completed each time you hear this sound. [ding] Remember to run in a straight line, and run as long as possible.
This physical fitness test is also known as the Cardiac Stress Test or Cardiovascular Endurance Test. 4. Beep Tests. This test is also commonly known as the Bleep Test or Shuttle Run. Some also refer to it as the Pacer Test or 20-meter Shuttle Run Test.f you're interested in finding out how you fare against standard measures, here are 5 of the most popular and commonly used physical fitness tests. 1. The Bruce Test Designed to evaluate cardiovascular performance, the Bruce Test was designed as a clinical treadmill stress test.