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Would ozone in front of a source of UV light form a shadow on a suitable indicator screen?
Wiki User
∙ 11y ago
yes, it would form it in a form of a smog
Wiki User
∙ 11y ago
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What are the Moon's umbra and penumbra?
If the light source is fairly large, it will create a total shadow, when the entire light source is blocked, and partial shadow where only part of the light source is blocked. The "umbra" is the area of total shadow, while the "penumbra" is the area of partial shadow.
What are the terms of umbra and penumbra and how do they relate to eclipses?
Shadows have two parts, the umbra and the penumbra. The umbra is the darker part of the shadow, in which all of the light from the source is blocked by the object casting the shadow. The penumbra, also known as the half-shadow, is the grayish part along the edge of a shadow in which only some of the light from the source is blocked.During a solar eclipse, if you are within the umbra of the moon's shadow, you are witnessing a total eclipse, and if you are within the penumbra of the moon's shadow, you are witnessing a partial eclipse.
What is it called when it is a complete shadow?
The darkest part of a shadow is called the "umbra" The lighter part of a shadow is called the "penumbra" An "antumbra" is the area of light which surrounds the object creating a shadow, as in a "ring of fire" eclipse (like the recent one in May, 2012). It can best be seen when the viewer is beyond the focal point of the umbra, but in line with it.
Why do shadows sometimes bend towards each other?
Position of te sun and the position of the object have affect on the shadow length. The higher the sun is in the sky the shorter the shadow. The lower in the sky the longer the shadow. Try this with a lamp or a flashlght on a wall. ?Making shadow puppets with your hands on the walls is a great way to learn about this. There are a number of really gifted shadow puppeteers on you tube to learn from.
Why is the penumbra important?
WikipediaThe umbra, penumbra and antumbra are the names given to three distinct parts of a shadow, created by any light source. For a point source only the umbra is cast.PenumbraThe penumbra (from the Latin paene "almost, nearly" andumbra "shadow") is the region in which only a portion of the light source is obscured by the occluding body. An observer in the penumbra experiences a partial eclipse. AntumbraThe antumbra is the region from which the occluding body appears entirely contained within the disc of the light source. If an observer in the antumbra moves closer to the light source, the apparent size of the occluding body increases until it causes a full umbra. An observer in this region experiences an annular eclipse.
Why does an object cast shadow on a screen 7 std science?
When a opaque object is placed between the source of light and the screen light from the source falls on a screen aceept some part which looks the shape of the object the Part of the screen wre high does not fall due to the object is called a shadow
What is the difference between a shadow formed by a point source of light and a extended source?
The shadow formed by the point source of light has a screen blocking it. So it is very precise and only forms an umbra. Whereas the other is not as precise and forms an umbra and a penumbra.
How could you change the size of your shadow?
You can either move closer to the light source or move the light source closer to you. The size of your shadow just depends upon how much of the light you are obscuring so the more you block out, the bigger your shadow.
Why is your shadow sometimes in front of you and sometimes. behind you?
Your shadow will fall in the direction opposite the source of light - with you between the light source and the shadow. The direction of your shadow relative to you will depend on what direction you are facing.If you are facing toward the light source, the shadow will be behind you.If you are facing away from the light source, it will be in front of you.If you have the light source to your right, the shadow will be to your left.If you have the light source to your left, the shadow will be to your right.If the light source is directly above you, the shadow will be directly under you.If you move past a light source, your shadow will move from behind you to beside you and then to in front of you.
What do you need in order to see a shadow?
We need an source of light, an opaque object blocking the path of light, a screen behind the opaque object.
What factors affect the size of a shadow formed on a screen?
The size of the shadows formed changes if the distance between the object and the screen is also changed. If there is an increase in the distance between the screen and the object, the size of the shadow also increases.
What is the size of the shadow and the distance of the object from the light source when a shadow is formed?
If you are using a point light source, the shadow's size is the object's size divided by the distance from the light source to the object multiplied by the distance from the light source to the shadow.
Why is a shadow always on the opposite side of the light source?
Your shadow will fall in the direction opposite the source of light - with you between the light source and the shadow. The direction of your shadow relative to you will depend on what direction you are facing.If you are facing toward the light source, the shadow will be behind you.If you are facing away from the light source, it will be in front of you.If you have the light source to your right, the shadow will be to your left.If you have the light source to your left, the shadow will be to your right.If the light source is directly above you, the shadow will be directly under you.If you move past a light source, your shadow will move from behind you to beside you and then to in front of you.
Why is your shadow sometimes in front of you and sometimes behind you?
Your shadow will fall in the direction opposite the source of light - with you between the light source and the shadow. The direction of your shadow relative to you will depend on what direction you are facing.If you are facing toward the light source, the shadow will be behind you.If you are facing away from the light source, it will be in front of you.If you have the light source to your right, the shadow will be to your left.If you have the light source to your left, the shadow will be to your right.If the light source is directly above you, the shadow will be directly under you.If you move past a light source, your shadow will move from behind you to beside you and then to in front of you.
Why do birds flying high not cast a shadow explain shortly?
when an object is closer to the light source,the larger and fuzzier is the shadow.also if the object is moved away from the screen,the shadow is fuzzier.therefore the bird which is close to sun and away from the ground casts a fuzzier shadow in the atmosphere which cannot be seen
When you place something close to a light source will it make a big shadow or a small shadow?
The closer an object is to a source of light the larger the shadow it will cast.
Is experience an effective indicator of a person's being a reliable source of information?
is reputation an effecive indicator of a person's being a reliable source of information
