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Your Perceived Stress Score

Compare your score to the “Average” scores below. You may compare against people of your age or your gender. If you are more than six points above the “average” than you probably have a medium-high...

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Hope Can Be Learned: Setting Priorities for Change

Hope, according to Snyder, has a lot to do with prioritizing areas needing improvement, identifying possible ways to achieve goals, selecting routes and following those routes. A logical first step is...

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What Is A Photometer And What Is It used for?

Photometry is the science that studying light, concerning its brightness. Photometry used to be done using the human eye until electric light sensitive tools like the photometer was invented. So what...

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Color Photometers

Color photometers measure the amount of light falling on an object along with the intensity of color coming from it. Such photometers are used to balance out the saturation of color and are...

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Hand-held photometers

These are used to concentrate on light readings in some locations of a photograph.

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Built-in photometers

These are photometers that are integrated into the camera. The practice came about when the importance of a photometer in picture taking was discovered.

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Spot photometers

Here, light readings are gotten from different areas of the subject being photographed, and then the photographer uses these readings so that he/she may know how to set the exposure of the camera for...

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Incident-light photometers

These photometers use an incident-light meter that measures the amount of light falling on the subject. It is the most accurate of the five photometers. In around 1861, three different types of...

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Rumford’s photometer

Rumford’s photometer works on the notion that the brighter a light source is, the thicker the shadow it cast.

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Uses of Photometers

Just to reiterate, photometers are used to measure light intensity. Photometers do so in the following ways. Illuminance Illuminance is the measure of the degree to which light illuminates a surface,...

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