five main features of laser rays
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1)Laser light is monochromatic;the light emitted from a laser is monochromatic,that is,it is of one wavelength (color).In contrast,ordinary white light is a combination of many different wavelengths(colors0
2)Directional;laser emits light that is highly directional.Laser light is emitted as a relative narrow beam in a specific direction.Ordinary light,such as coming from the sun,a light bulb,or a candle,is emitted in many directions away from the source.
3)Coherent;the light from a laser is said to be coherent,which means the wavelength of the laser light are in phase in space & time.
4)The physical size of a laser depends on the materials used for light emission,on its power output,and on whether the light is emitted in pulses or as a steady beam.
5)In optically pumped lasers,the basic elements is a transparent,non-conducting crystals such as yttrium aluminium garnet(YAG).
2)Directional;laser emits light that is highly directional.Laser light is emitted as a relative narrow beam in a specific direction.Ordinary light,such as coming from the sun,a light bulb,or a candle,is emitted in many directions away from the source.
3)Coherent;the light from a laser is said to be coherent,which means the wavelength of the laser light are in phase in space & time.
4)The physical size of a laser depends on the materials used for light emission,on its power output,and on whether the light is emitted in pulses or as a steady beam.
5)In optically pumped lasers,the basic elements is a transparent,non-conducting crystals such as yttrium aluminium garnet(YAG).
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1. coherent
2. directional
3. momochromatic
2. directional
3. momochromatic
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