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Here we have to recall the refraction phenomenon of light through a glass prism. The net effect of the ray after passing through the prism will be the deviation towards the base of the prism.
So in case of concave lens, it can be imagined to be made up of many prisms with their base seated towards the edges of the concave lens. Hence the parallel beam entering will be diverted towards the edge and so the rays are to be diverged. So no chance of convergence and hence no focusing.
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∙ 13y ago
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What type of lens can cause a beam of light to focus or come together?
Concave lenses
Why is a concave mirror used in microscopes instead of convex lenses?
To focus AND reflect light through the specimen slide to the lenses.
How does concave lens work?
Concave lenses work by refraction of light.
What does concave lenses do to light rays?
a concave lens diverges the light ray travelling in a straight parallel path.
Why don't concave lenses being light rays into focus?
Simply put, light rays do not focus light because the focus is on the wrong side of the lens, with respect to the incoming light. If you draw the ray diagram you will see that the parallel rays transmitted may appear to be coming from a focus. This is what they mean by virtual.
How are convex lenses and concave lenses the same?
They are not the same. Convex lens bulge outward, and concave lenses go in ward. Convex lenses focus light, and concave lenses spread light out.
Do microscopes use concave or convex lenses?
They use convex lenses because they need to focus the light IN to the eye. Convex focuses in while concave spreads the light out. So, they use convex lenses.
What type of lens can cause a beam of light to focus or come together?
Concave lenses
Why is a concave mirror used in microscopes instead of convex lenses?
To focus AND reflect light through the specimen slide to the lenses.
What lenses refract light outward and are thinner in the middle?
its a concave lens(:
What is the telescope that uses lenses to bring visible light to a focus?
refractor
How does concave lens work?
Concave lenses work by refraction of light.
What are the use of concave?
Concave lenses are used todiverge rays of light.
How do lenses cause light to focus?
There are two types of lenses- Concave and Convex. The convex ones are bulging from the center and the concave ones are bulging at the ends.Convex=()Concave=)(The convex ones focus light by refracting them so the light rays meet and form a focus.===========()>The concave do the opposite, the light rays bend outwards [sorry for the meeting of the lines in the below pic, they do not meet but bend outwards).===========)(
What does concave lenses do to light rays?
a concave lens diverges the light ray travelling in a straight parallel path.
Why don't concave lenses being light rays into focus?
Simply put, light rays do not focus light because the focus is on the wrong side of the lens, with respect to the incoming light. If you draw the ray diagram you will see that the parallel rays transmitted may appear to be coming from a focus. This is what they mean by virtual.
How are convex and concave lenses different from each other?
Convex lenses are thicker in the middle than at the edges. They cause light rays to converge. Concave lenses are thicker at the edges than they are in the middle. They cause light rays to spread out, or diverge.
