If I shine a laser pointer at the moon would it dazzle an astronaut on the surface?
A handheld laser pointer. I know they come in a range of colours and powers. What would the astronaut see if they looked at Earth at the time the light reached the moon?
No, it would not be visible on the Moon. There is a science experiment where powerful lasers on Earth are aimed at the retro-reflector mirrors on the Moon, and we get only a few photons back each second.
A 15 watt laser spreads out to about 7 km by the time the beam gets to the moon (your laser pointer spreads out a lot more than that). The power of the beam on the Moon is only 0.15 microWatts!
Modify Your Laser Pointer
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Maverick Laser Surface Thermometer $41.95 1 Second – Celsius, Fahrenheit Reading – Automatic On/Off, Backlit Digital Display – For Grill… |
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NorCross Marine Sonic Laser Scale XP $79.99 The NorCross Marine Sonic Laser Scale XP is a multifunction ultrasonic fish measuring device that doubles as a solid state digital scale. Traditional fish measuring devices require the user to lay a fish on a measuring board or stretch out a conventional measuring device. Well documented research indicates that laying a fish on its side creates considerable damage to internal organs and removes th… |
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ThermoWorks Gun shaped Point and Shoot big digit Next Generation Food Safety Infrared thermometer with built in laser pointer $69.00 ThermoWorks Gun shaped Point and Shoot big digit Next Generation Food Safety Infrared thermometer with built in laser pointer: High Quality 12:1 optics, Bright laser pointer, Point and Shoot simplicity. Max temp and reading hold features, Handy button for switching from °C to °F ,Range to 536°F (280°C). Measuring Range: -67°F to 536°F, (-55°C to 280°C). it gives the reading in one second!…. |
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PowerPoint Radio Frequency Wireless Remote Controller w/Red Laser Pointer (Style V105 W/O Flash Memory) … |
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HDE Temperature Gun Infrared Thermometer w/ Laser Sight $28.00 Available in red or yellow…. |
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Kintrex IRT0421 Non-Contact Infrared Thermometer with Laser Targeting $44.95 The IRT0421 Non-Contact Infrared Thermometer with Laser is designed to accurately measure temperature from a distance. Simply pull the trigger and aim the pistol grip thermometer at an object using the laser indicator and the unit will provide an accurate temperature measurement in less than a second. The IRT0421 has an advanced highly accurate infrared sensor with a Distance to Spot Ratio of 12 t… |
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Bynovel Laser Eye Protection Safety Glasses Goggles Goggle Glass Shield for Green Blue Laser Pointer $5.99 Laser exposure to the eyes is very dangerous and must be prevented. This accessory is imperative to your eye protection, and does the job quite well. Please note: Do not look directly at the laser beam under any circumstances, even with protective goggles. These highly functional laser protection goggles will protect your eyes from excessive 532nm green and blue laser rays. Item comes with FREE… |
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Monk – Season Four $10.64 Adrian Monk is still “the man” as this brilliant fourth season demonstrates. Not that his confidence in his crime-solving abilities isn’t tested from time to time. In the fun season-opener, Monk finds himself upstaged by low-rent private eye Marty Eels (guest star Jason Alexander in a spinoff-worthy role). The very flappable Monk is further undone by Eels’ seemingly uncanny ability to find clues i… |
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Episode 4 $1.99 … |
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AG13/LR44 Alkaline Button Cell Battery – 10 pack $0.01 This is a new set of 10 type 357/LR44 alkaline watch batteries. These batteries are commonly used for Swatch, Fossil, Timex and Casio brands. Also used in many toys and laser pointers. Brand new & guaranteed factory fresh…. |
