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Visible Light Spectrum

Join us here to ask and answer questions on the "illuminating" topic of the visible light spectrum. This includes questions about: refraction, reflection, rainbows, prisms, mixing colored lights, and the spectrum of colors that make up white light.

1,220 Questions

A couple of dashboard lights are out how do you change the light bulbs it is a 98 ford expidition Eddie is it hard to do?

Instrument Cluster Removal & Installation 1. Disconnect the negative battery cable. 2. Remove the cluster opening trim panel. 3. On vehicles equipped with an automatic transmission, remove the loop on the indicator cable assembly from the retainer pin. Remove the thumbwheel bracket screw from the cable bracket and slide the bracket out of the slot in the steering column tube. 4. Remove the instrumental cluster retaining bolts. 5. Pull the instrumental cluster out of the instrument panel. 6. Detach the electrical connectors. 7. Remove the instrument cluster. To install; 8. The installation is the reverse of the removal. 9. Connect the battery cable, and check the operation of all gauges, lights and signals. *** Turn the light bulb housing counter clock wise. Sometimes they are very hard to turn. Don't be afraid to turn them. ***

What could cause the dash lights and lights in the heater not to work on a 1993 Tracker new ECM alternator and bulbs?

Possible causes could include a blown fuse, faulty wiring, or a defective switch. Check the fuse box for any blown fuses and inspect the wiring for any damage or loose connections. Additionally, ensure that the switch controlling the dash lights and heater is functioning properly.

Instructions to replace 1999 Toyota Camry courtesy light bulb in interior roof?

There is a small rectangular slot on the right side (passenger side) of the transparent cover/lens. Put a properly fitting (not too small, not too big) flat screwdriver in the slot and leverage the cover/lens downward. It should pop out. Don’t be too rough, but you can apply some force—the cover is fairly strong. After that it is easy to pull the light bulb from between the spring terminals. Put the new bulb in and pop the cover back in its slot.

Where can you find the reverse light switch on your 95 neon 5 speed you did not see any wires other than speedo on the trans?

The reverse light switch on a 1995 Neon with a 5-speed manual transmission is typically located on the transmission case near the shifter linkage. It may be a single wire sensor that activates the reverse lights when the transmission is shifted into reverse. If you cannot locate the reverse light switch, consult the vehicle's service manual for specific information.

More info on changing corner lights on BMW 323?

If you are in front of the car, there should be alittle grey tab on back of each of the corner lamps. you have just enough room to push the little tab on each side outwards to release. be careful not to break the tabs though because they are only plastic. Once it has released the tab, pull the corner lamp forward toward you. remove light by pressing the little tabs on the connector toward one another and pull the light out.

On your 93 eldorado your digital dash wont light up the only thing that lights up is the speed meter only shows up can any one help you with this?

There should be a button to the left labeled information, it should switch between the speed and the main stuff. If the button doesn't work properly, disconnect the battery for about an hour and it should reset.

Why does the word light as in weight mean illuminate?

Run, square, right, can, wash, clear, amd the list goes on. Light can mean not heavy or light by which we see. The following text is a cut and past job from the Yahoo! Dictionary: "light 1 (lt) KEY NOUN: Physics Electromagnetic radiation that has a wavelength in the range from about 4,000 (violet) to about 7,700 (red) angstroms and may be perceived by the normal unaided human eye. Electromagnetic radiation of any wavelength. The sensation of perceiving light; brightness: a sudden light that made me blink. A source of light, especially a lamp, a lantern, or an electric lighting fixture: Turn out the lights when you leave. The illumination derived from a source of light: by the light of the moon. The particular quantity or quality of such illumination: moved the lamp closer to get better light. The pathway or route of such illumination to a person: You're standing in his light. A mechanical device that uses illumination as a signal or warning, especially a beacon or traffic signal. Daylight. Dawn; daybreak. Something, such as a window, that admits illumination. Architecture One of two or more openings in a window divided by a mullion or mullions. A source of fire, such as a match or cigarette lighter. Spiritual awareness; illumination. Something that provides information or clarification: threw some light on the question. A state of awareness or understanding, especially as derived from a particular source: in the light of experience. Public attention; general knowledge: brought the scandal to light. A way of looking at or considering a matter; an aspect: saw the situation in a different light. Archaic Eyesight. lights One's individual opinions, choices, or standards: acted according to their own lights. A person who inspires or is adored by another: My daughter is the light of my life. A prominent or distinguished person; a luminary: one of the leading lights of the theater. An expression of the eyes: a strange light in her eyes. Light In Quaker doctrine, the guiding spirit or divine presence in each person. The representation of light in art. VERB: light

How can you fix your 1990 300zx when you turn the lights on only the HI beams workwith no tail lights on but when you step on the brake the LOW beams go on tail lights go off and the dash lights spedo?

your light wires have been crossed somewhere ( probably at the tail lights, brake light circuit crossed with marker lights ) look for recent wiring work on the lights and make sure the proper wires match up.

Is it normal for a 3-way dimmer to reduce the maximum brightness of a halogen light fixture?

Not really. This usually occurs when the dimmer switch is incompatible with the type of lamp being used or is going bad. If you've recently replaced the switch then check to see if the switch you used is suitable for use with halogen lamps. Halogen lamps draw more current than nomal incandescent lamps and if your switch was not made for use with this type of lamp you are creating an unsafe condition and a potential fire hazzard.

What do you do to fix a temperature light that is not working?

First, check the bulb to see if it needs replacing. If the bulb is fine, then the issue might be with the temperature sender unit or wiring. You may need to replace the sender unit or re-wire the connections to fix the temperature light.

Why does courtesy light flash and dinging noise occur in 1996 Dodge Stratus when driving?

Usually that means the doors are open. If they are closed, its probably the door switch. Easy and inexpensive part to fix. Its the little black switch located on the B- and C-pillars near the latch. Two screws and a electrical quick disconnect and its out. Install is reverse.

What are the laws on orange emergency lights in vehicles in Wisconsin such as a lightbar or deck mounted lights?

I did some online research on your question. I found some useful info on your states official Dept. of Transportation site. What I found is here: http://www.legis.state.wi.us/Statutes/Stat0347.pdf

What are the cross-shaped lights on the mountainside visible to the southwest of Denver Colorado?

The cross-shaped lights visible on the mountainside southwest of Denver, Colorado, are part of the annual Christmas display known as the "Chapel on the Rock." The lights form a cross on Mount Lindo as a symbol of the holiday season and are a local tradition cherished by many in the area.

What is the normal behavior for Renault 5 engine temperature light?

When engine temperature climbs near to 100C this light turns on. But this is a late response to alert you that your engine can burn. I suggest you install a numeric thermometer. It's worth knowing the light is wired to the oil pressure light via a diode (like an electrical one-way valve) This is so the bulb lights with the ignition on but the engine stopped- renault's cheap yet reliable way of letting you know the bulb's not blown. (otherwise it would only ever illuminate upon overheating!) The product of this, to the observant, is the lights work simultaneously on normal starting and stopping, giving the (wrong) impression something's amiss.

On older toyotas there is an orange light that has a rectangle filled with vertical lines you thought it represented a radiator but cannot find a problem with the radiator What does this light mean?

The orange light with a rectangle filled with vertical lines on older Toyotas typically represents an issue with the transmission fluid temperature. It's a warning to check the transmission fluid level and ensure it is not overheating. If you're unable to find any issues with the radiator, it would be best to have the transmission fluid checked and any necessary maintenance done.

How does light travel through a camera?

The Lens is the image-forming device on a camera. The lens bends light rays to project an image onto a light sensitive medium, which may be any of several forms, including film, sensitized glass plate, or electronic sensor.

The Diaphragm is a variable opening which controls the quantity (brightness) of light falling on the light sensitive medium.

The Shutter controls the length of time light is permitted to fall on the light sensitive medium. It can take many forms, but usually has some method for precision adjustment of the time it is open.

Light passing through the lens, aperture, and (when open) the shutter forms an image of specific brightness for a specific duration on the light sensitive medium.

Light also passes through a viewfinder system, which may be a part of the optical system of the camera, or separate from it. In the most complex cameras, some of the light passing through the lens is diverted into a viewfinder by means of a mirror or prism. By using some of the same light passing into the camera, these systems permit the user to see essentially what the camera is seeing.

(See discussion)

Do the daylight lights go off when you turn the car off?

daytime running lights always go off when you shut off the car.early ones had time delay. check your twilight sentinel you'll feel a click when you turn it all the way when you feel the click turn it the other way

What can you do if your lights won't turn on and you've already replaced the light switch?

If the lights still won't turn on after replacing the light switch, check the circuit breaker to ensure it hasn't tripped. You can also inspect the wiring for any loose connections or faults. If these steps don't solve the issue, it may be best to consult a professional electrician to diagnose and fix the problem safely.

Do the sun's tanning rays penetrate water and to what degree?

All the sun's rays penetrate water, but each color penetrates to a different depth. The colors at the upper end of the light spectrum, especially the UV (ultraviolet) that causes tanning, penetrate deepest. The UV portion of the sun's light can penetrate into clear water for a hundred feet or more at midday. The safest way to avoid overexposure is to remember that if you can see the sunlight, it may cause sunburn, and to limit exposure accordingly or perhaps wear a T-shirt or wet-suit.

How do you troubleshoot a pool light if a new replacement bulb does not light?

We had a problem,year after year with every bulb we had replaced. My pool contractor would check the electrical current in the switch, in the connections under the plate in the deck, and in the fuse box. He would also check for a current in the bulb everytime. No problem would show up each time but the bulb would never stay lit for more than 30 seconds everytime it was replaced.

It took me five years to get him to remove the light and low and behold, the contacts were rusted.

Hope this helps. Lori

How do you remove the light bulb from the underwater light?

You need to remove the screw that holds the light ring and pull the whole light fixture out of the water and up onto the deck. There should be enough wire wrapped around the back of the light to allow this. Remove the lens, replace the bulb, and reinstall the lens with a new gasket, being careful not to get any water inside the fixture. Wrap the excess wire around the back of the light fixture and replace it in the niche, securing it with the screw.

A. I would add: You need to test the GFCI, the wiring of the whole fixture - continuity test. If this is a fairly old fixture - my decision would be to replace the entire assmebly with a new one. If you have no GFCI then would be critical that you add one. And lastly but not least, you should have a pool tech service the light. He will know what to look for and how to correct any situation with your light. If there is something wrong with your light assy. and you do not find it by testing you put yourself and anyone who uses the pool in a great deal of danger if the light should malfunction. The codes specify that anytime you work on a pool light you then need to bring that product to current code. That also includes the main drain grate. Yes if you or a pool tech works on any portion of the pool for repairs the code demands that the main drain be brought to current code requirements. So it is not only a matter of just changing the light bulb and gasket.

Where can you find light bulb base adapters to put 120V candelabra lights in a 240V chandelier from Czechoslovakia?

First off, I am NOT an electrician, but I have guts. I just hung a European chandelier and hooked it up to 110 voltage. It works, but it doesn't put out as much light as it would with 220. A more elegant solution would be to take the lamp to a shop and get it rewired. If you want to do it yourself, I believe you can buy all the necessary parts at Home Depot.

Improved answer

Search Google for "light bulb adapters" you will need E-14 to E-12 adapters, one word of caution though, these types of candelabras have very small wiring and using higher wattage bulbs could be a fire hazard so I would recommend using LED or florescent bulbs!

Set light fifth avenue?

Are you asking for lighting for a Chrysler fifth avenue? If so, there are plenty for sale on Ebay.

Is light a form of a electromagnetic radiation?

Yes, light is a form of electromagnetic radiation. It falls within the electromagnetic spectrum and is characterized by its wave-like behavior and ability to travel through a vacuum at the speed of light.

What does it mean when you wipe and see a light pinkish color only a couple of times in the last three weeks?

Seeing a light pinkish color when wiping could be due to various reasons such as implantation bleeding, hormonal changes, or minor irritation. If it persists or is accompanied by other symptoms like pain or unusual discharge, it is recommended to consult a healthcare provider for further evaluation.