The exclamation light, on your Ford focus, is a reference to the oil needs to be changed. The light can be reset by changing the oil.
Simply put, light rays do not focus light because the focus is on the wrong side of the lens, with respect to the incoming light. If you draw the ray diagram you will see that the parallel rays transmitted may appear to be coming from a focus. This is what they mean by virtual.
The alternator is over or under charging.
Adjustment knobs are used to focus light in a light microscope.
Adjustment knobs are used to focus light in a light microscope.
Adjustment knobs are used to focus light in a light microscope.
Focus has more than one definition. It can mean the point of a mirror or lens where all light rays converge. It can simply mean a generic point of convergence, a point where everything or everyone gathers. It can mean what is or should be occupying your attention at the moment.
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They're an additional feature to focus your attention towards the traffic light. The human eye is quicker to catch a flashing light than a steady light.
to focus light means to condense the energy of a light beam down to a smaller beam through refraction.
Hazard light??? Do you mean charging system light? If so it is on because the alternator is not functioning properly.
Red warning light looks like a snow flake in Focus Fiesta and simply means that it is cold outside. This is the case when the temperature goes below 5 degrees Celsius.