A light or lamp would have light energy. Electrical devices like computers use electrical energy. Activity 2 When the object is resting on the desk, it has potential (stored) energy because it could fall off of the desk. When it falls, it has kinetic energy, because it is moving. ...
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What is a light-emitting diode (LED) backlit display? An LED-backlit display is a type of LCD display that uses LEDs to illuminate the screen. It offers better energy efficiency, thinner form factors, and improved color reproduction compared to traditional cold cathode fluorescent lamp (CCFL) ...
example of this is to use extracting light guides to replace fluorescent lighting in freezer cases, allowing for the light source to be placed outside the freezer for increased energy efficiency. Another example is creating light for a surgical environment without putting electronics near a patient....
A significant aspect to consider is thelight spectruma lamp uses. Therapy lamps typically produce blue or full-spectrum light therapy. While blue light has been proven to be more effective than full-spectrum lamps in treating SAD and low energy levels, it can be harmful to the eyes.This is ...
When a p.d. of is applied across it, then the power dissipated by the lamp is .B1Resistance of lamp Current flowing through the filament,In one second, quantity of charge flowing through it, C1A1The temperature (or internal energy) of the filament rises with workB1done by the electrons ...
The light would probably irritate neighbors, frighten passers-by, and waste energy. To minimize accidental activations, a motion sensor lamp may have a time delay mechanism so that a moment of motion at the edge of the sensor area does not activate the light. A motion sensor lamp can ...
While cool beam lamps may be useful for situations in which a heat-sensitive object must be illuminated, they may be dangerous in certain other uses. Many recessed light fixtures may pose a danger of fire if used with a cool beam lamp. This is because the infrared heat energy that passes...
和"Blue light is everywhere. It is sent out both by artificial (人造的) light and by our biggest light-the sun!"可知,手机,太阳都可以发出蓝光,还有人 造光也发出蓝光,因此月亮不会发出蓝光,故选B 62.细节理解题。根据"The strong energy of blue light allows it to pass easily through the ...