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A flashlight is luminous when it emits light (turned on). It's non-luminous when it's off or the battery dies.

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โˆ™ 2022-01-24 23:25:43
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Q: How can a flashlight be both luminous and non-luminous at the some time?
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What is the product of complete combustion in non luminous flame?

Carbon dioxide, water and some carbon residue.

What makes a flame non-luminous?

How: by opening up the air hole on a Bunsen burner after it is turned on.........What: Some atoms or molecules are not luminous when hot. They emit light outside the spectrum we can see, like CO2 emits infrared. Others only emit a faint color in the flame.The non-luminous is made when there is a complete combustion or complete burning process. It happens when there is more than the enough oxygen in the surroundings or in the place where the process will happen.

Example of luminous body and non-luminous body?

Light, like heat, is a form of energy and there is a close connection between the two. Most bodies (i.e. objects) which emit, or send out, light also emit heat. The Sun, for example, emits both light and heat energy. So does an electric lamp or a fire. We can see these bodies because they give out light. They are called luminous bodies. The Moon, however, is not a luminous body because it does not produce light. We can see the Moon in the sky only because it reflects the light from the Sun. This means the Sun sends out light to the Moon and the Moon sends the Sun's light back to Earth. So, the Moon is a good example of a non-luminous body. Because it is non-luminous, it does not produce heat. When there is no sunlight, it is very cold there. The temperature can be 129°C below zero. A piece of iron or glass is also non-luminous. W fiat are transparent, translucent and opaque substances? So, light is an important source of energy. We can see things only because there is light from luminous bodies. But light cannot pass through every substance. For example, we can see through clear glass or water but we cannot see anything behind a wall. Substances such as clear glass, water or some kinds of plastic are called transparent substances. That is, light can pass through them, and we can see what is on the other side. These transparent substances can be used for different purposes. For example, windows are made of glass because we want to be able to see what is outside. But some substances are not clear; in other words, they are not transparent. We cannot see the objects behind them but we can only see the light. These are called translucent substances. Some types of glass are like this. There are also substances called opaque. Light cannot pass through such substances and we cannot see anything behind them.

Why do some compound dissolve in both hexane and water?

Calcium Carbonate Some compounds are amphipathic. Water is a polar solvent and hexane is a nonpolar solvent. For a compound to dissolve in both, it would need to posses some nonpolar properties and some polar properties.

What properties do both and plastic share that allow them to be substituted for each other in some applications?

what properties do both glass and plastic share that allow them to be substituted for each other in some applications? What do glass and plastic have that make them quite different

Related questions

Are stars luminous?

Yes, they are luminous. Some of them are more luminous than the Sun and some are less luminous than the Sun.

Are satellites luminous or non-luminous?

Non-luminous. Some are reflective.

How are moon and planets are visible even if they are not luminous?

For the same reason that a rock is visible even though the rock is not luminous.Some source of light, such as a flashlight, illuminates the rock, and some of thelight from the flashlight bounces off of the rock in just the right direction to enteryour eye.Similarly, in our neighborhood, some source of light, such as a flashlight, illuminatesthe moon and the planets, and some of the light from the flashlight bounces offof the moon and planets in just the right direction to enter our eyes.The Sun is that source of light.

Is a table non luminous?

Some tables may be painted with luminous paint. Most are not luminous.

Why it is possible to see non-luminous objects?

It's often possible to see non-luminous objects if you illuminate them with a source of light, such as a flashlight, a candle, or a drop of golden sunshine. No object absorbs all of the light that falls on it, so some light is always reflected from it, and some of that reflected light finds its way to your eye. Once any of the light falling on the object has reflected from it, it's very much as if the object were self-luminous.

Is a jellyfish luminous?

some are not all

What are luminous and non luminous objects?

Luminous objects are those which can produce or give out light of their own, while non-luminous objects cannot produce or give out their own light. Some examples of luminous objects would be the sun, stars, fireflies, glowworms and some deep sea fish Some examples of non-luminous objects would be the planets Mercury, Venus, Earth, Mars,Jupiter, Saturn, Uranus, Neptune and also Moons.

Why does the non-luminous flame produce more heat than the luminous flame?

because luminous object loss some energy in the form of flame

Man-made luminous objects?

What are some man-made luminous objects? Someone please answer! Anonymous

What are some examples of luminous energy?


Are stars luminous or non-luminous?

All things, except black holes, are luminous. That includes stars. You might think that some other things are not luminous but that's because you can't see the kinds of light that they emit.

What does it mean to dream about a luminous hole in the back of your right hand?

In a Christian context, any hole in the hand could refer to the wounds of Christ. A luminous hole in either or both hands suggests some sort of spiritual suffering or sacrifice.

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