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The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner may be called photoelectrons.

The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner may be called photoelectrons.

Complete Nurse Card Pack

Find a huge range of Medical Reference Card Packs and Nursing Study Guides, for student resources and nursing education. Clinical information for nurses and midwives.

flashing beacon

A flashing beacon has many uses. It can be employed as a distress signal on highways or as a direction pointer for parking lots, hospitals, hotels, etc.