A full length image of a distant tall bu...

A full length image of a distant tall building can definitely be seen by using

a concave mirror

a convex miror

a plane mirror

both concave as well as plane mirror.

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Paper delievery boy wants to park his cycle at some point P and deliver the newspaper to house A and B . Where should he park the cycle so that his walking distance AP + Bp will be least ? You can use relfection symmetry here . Let A' be the image of A in the mirror line which is the street here . Then the point P is the ideal place to park the cycle . (where the mirror line and A'b meet ) Can you say why ?

An astronomical telescope has an objective lens of focal length 20 m and eyepiece of focal lengh 1 cm. If this telescope is used to view the moon, find the diameter of the image formed by the objective lens given the diameter of the moon is 3.5 xx 10^6 m and radius of lunar orbit is 3.8 xx 10^8 m .

A telescope has an objective lens of focal length 200 cm and an eye piece with focal length 2 cm.If this teleescope is used to see a 50 metre tall building at a distance of 2 km,what is the height of the image of the building formed by the objective lens?

From a point P on the ground the angle of elevation of the top of a 10 m tall building is 30^@ . A flag is hoisted at the top of the building and the angle of elevation of the top of the flagstaff from P is 45^@ . Find the length of the flagstaff.

From a point P on the ground the angle of elevation of the top of a 10 m tall building is 30^@ .A flag is hoisted at the top of the building and the angle of elevation of the top of the flagstaff from P is 45^@ . Find the length of the flagstaff and the distance of the building from the point P. (You may take sqrt3 = 1.732)

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A small telescope has an objective lens of focal length 140cm and an eyepiece of focal length 5.0cm. What is the magnifying power of the telescope for viewing distant objects when- the final image is formed at the least distance of distinct vision (25cm)?

MODERN PUBLICATION-REFLECTION AND REFRACTION-EXAMPLE

A full length image of a distant tall building can definitely be seen ...
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A concave mirror of focal length 20 cm forms a real image at a distanc...
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A convex mirror used on an automobile has a radius of curvature of 3 m...
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An object 1 cm high is place on the axis and 15 cm from a concave mirr...
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The image formed by a concave mirror is half in size of the object. If...
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An object 5 cm high is placed at a distance of 10 cvm from a convex mi...
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When an object is placed at a distance of 60 cm from a convex spherica...
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Find the position of an object which when placed in front of a concave...
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An object is placed 10 cm from a concave mirror of radius of curvature...
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An object is placed 15 cm from a convex mirror of radius of curvature ...
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A 4.5 cm needle is placed 12 cm away from a convex mirror of focal len...
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What is the speed of light?
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The refractive index of water is 4/3 and flint glass is 1.65. What is ...
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A ray of light passes from to air to glass at an angle of incidence of...
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A ray of light of frequency of 5 xx 10^(14)Hz is passed through a liqu...
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Velocity of light in a medium is 1.5xx10^8 ms^-1. Find the refractive ...
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The refractive index of diamond is:
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A ray of light passes from air to glass. The glass of incidence is 45^...
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