Name the type of mirror used in the following situation and support your answer with a reason:
$(a)$ Solar furnace
$(a)$ Solar furnace
(CONCAVE MIRROR) Concave mirror.
Concave mirrors are converging mirrors. They are used in solar furnaces because they converge the parallel rays of sunlight incident on them to a single point,known as the principal focus. This concentration of light energy produces a large amount of heat at that point,which is useful for heating purposes.
Concave mirrors are converging mirrors. They are used in solar furnaces because they converge the parallel rays of sunlight incident on them to a single point,known as the principal focus. This concentration of light energy produces a large amount of heat at that point,which is useful for heating purposes.
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Similar Questions
Find out,from the table,the medium having the highest optical density. Also,find the medium with the lowest optical density.
Material medium Refractive index Air $1.0003$ Ice $1.31$ Water $1.33$ Alcohol $1.36$ Kerosene $1.44$ Fused quartz $1.46$ Turpentine oil $1.47$ Benzene $1.50$ Crown glass $1.52$ Canada Balsam $1.53$ Rock salt $1.54$ Carbon disulphide $1.63$ Dense flint glass $1.65$ Ruby $1.71$ Sapphire $1.77$ Diamond $2.42$
| Material medium | Refractive index |
| Air | $1.0003$ |
| Ice | $1.31$ |
| Water | $1.33$ |
| Alcohol | $1.36$ |
| Kerosene | $1.44$ |
| Fused quartz | $1.46$ |
| Turpentine oil | $1.47$ |
| Benzene | $1.50$ |
| Crown glass | $1.52$ |
| Canada Balsam | $1.53$ |
| Rock salt | $1.54$ |
| Carbon disulphide | $1.63$ |
| Dense flint glass | $1.65$ |
| Ruby | $1.71$ |
| Sapphire | $1.77$ |
| Diamond | $2.42$ |
Medium
View SolutionAn object of size $7.0\, cm$ is placed at $27\, cm$ in front of a concave mirror of focal length $18\, cm$. At what distance from the mirror should a screen be placed,so that a sharp focussed image can be obtained? Find the size and the nature of the image.
Difficult
View SolutionAn object is placed at a distance of $10\, cm$ from a convex mirror of focal length $15\, cm$. Find the position and nature of the image.
Difficult
View SolutionWhy do we prefer a convex mirror as a rear-view mirror in vehicles?
Medium
View Solution$A$ convex lens forms a real and inverted image of a needle at a distance of $50\, cm$ from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the object? Also,find the power of the lens.
Medium
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