Flashlight
Reliable flashlight information
Is a mirror or a flashlight an optical element?
Reasons?thanks
How do you calculate the number of lumens in a torch flashlight?
I recently purchased 2 LED torch flashlights. 1 was rated 1,000 lumens max. and the other at 1,600. I have a digital illuminance meter but would like to know how those figures were derived. IE The distance between the flashlight and meter sensor, on spot or wide angle, in daylight or when it's pitch black in a room.
How long can this vinegar battery hold it's charge? And, can this vinegar battery power a 6 Volt flashlight?
Vinegar battery in question the question is not in the video youtube.com watch?v BjUUMhPU3GcPlease answer.
A flashlight uses batteries that add up to 6.0 V and has a power output of 0.64 W. How much current is drawn?
How long does it take to make a flashlight? and how many are produced a day?
this is for an introduction to engineering project. i'm asking approximately how long does it take for a flashlight to get made in a factory? and how many are produced a day? also if you could tell me how much it costs to manufacture one and how much they are sold for? sorry... i'm asking alot haha
A nichrome wire with a resistance of 19 is connected across the terminals of a 1.5 V flashlight battery. How?
What will give a stronger glow: led uv flashlight or floresent black light?
Does light ex. Sun or flashlight determine your real eyecolor?
Example when eye doctors check your eyes with a little light because in the regular light or darkness I can't determine eyecolor
If we can only see light from 400nm to 700nm then what wavelength is a flashlight?
A violet laser is 405nm, a green laser is 532nm, a red laser is 550nm, the colours are determined by the wavelength so what i am wondering is what wavelength is ordinary light we see from a flashlight, celine bulb or LED bulb? 10 points best answer.
If i have a pair of infared goggles and a flashlight with infrared LED'S ,could i see in the dark?
i want to make infrared goggles and an infrared flashlight to see in the dark like " night vision" Would this work?
A 6-volt flashlight bulb uses 2 amps. What is the power of the bulb?
Need sugggestions for a pen-type flashlight that has a Class II Div I rating so that it's intrinsically safe.?
Looking for a AAA or smaller intrinsically safe flashlight that will fit in a shirt pocket with a Class II Div I rating. Any suggestions would be greatly appreciated.
We all know the speed of light is 186,240 miles per sec - if light is sent from either laser or flashlight?
the speed is the same but does the ray of light keeps going on forever and only stopped or partially stopped by gas, dust, etc...???..I like the answers given but I expected a little more information. I'll select a best answer in next couple of days unless unless nothing is added then I will have to put it up for the mass to vote for what is felt is the best answer.Tks you for your answers
12 LED versus 9 LED flashlight?
the 12 is almost twice the price for a low end black light flashlight. Is it worth it ?Thanks
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