Find the focal length of a convex mirror whose radius of curvature is 32 cm.
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The radius of curvature of a spherical mirror is 20 cm. What is its focal length
Here, radius of curvature, R = 20 cm. Focal length, f=? We know, that, f =R/2 = 20/2 cm = 10 cm The focal length of spherical mirror is 10 cm.
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An 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,
Given, u=-10 cm, f=+15 cm,v=? From mirror formula, 1/f=1/v+1/u or 1/v=1/f=1/u =1/v=1/15=1/(-10)=1/15+1/10=(2+3)/30 or v=30/5=+6 cm That is image is formed at a distance of 6 cm from the mirror behind it. The image is erect...
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An object 5 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image,
Radius of curvature of convex mirror, R = 30 cm. Focal length of convex mirror, f=R/2=30cm/2=15cm Now h=5cm,u=-20cm,v=?,h'=? Using the mirror formula 1/f=1/u+1/v, we have 1/v=1/f=1/u=1/15=1/-20=1/15+1/20=(4+3)/60 v=60/7=8.6cm. Thus, image is formed at a distance of 8.6cm...
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How can you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?
By observing the virtual images formed by the three mirrors, we can distinguish between the mirrors as: (i) Plane mirror will produce an image of the same size, (ii) Concave mirror will...
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You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens.
(b) concave mirror or convex lens.
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You are provided with a concave mirror, a convex mirror, a concave lens and a convex lens. To obtain an
(b) concave mirror or convex lens.
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You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from
(c) both concave mirror and convex lens.
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An object is placed at a distance of 10 c m from convex mirror of focal length 15 cm......?
Given, u=-10 cm, f=+15 cm,v=? From mirror formula, 1/f=1/v+1/u or 1/v=1/f=1/u =1/v=1/15=1/(-10)=1/15+1/10=(2+3)/30 or v=30/5=+6 cm That is image is formed at a distance of 6 cm from the mirror behind it. The image is erect and virtual.
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A car is fitted with a convex side-view mirror of focal length 20cm.
The correct answer is:(b).
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Assertion : The focal length of the convex mirror will increase, if the mirror is placed in water.
(d) Focal length of the spherical mirror does not depend on the medium in which it placed.
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