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प्रश्न
The radius of curvature of a concave mirror whose focal length is 5cm is ______
उत्तर
The radius of curvature of a concave mirror whose focal length is 5cm is 10 cm
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संबंधित प्रश्न
A student obtained a sharp image of a candle flame placed at the distant end of the laboratory table on a screen using a concave mirror to determine its focal length. The teacher suggested him to focus a distant building, about 1 km away from the laboratory, for getting more correct value of the focal length. In order to focus the distant building on the same screen, the student should slightly move the
(a) mirror away from the screen
(b) screen away from the mirror
(c) screen towards the mirror
(d) screen towards the building
What is the position of the image when an object is placed at a distance of 20 cm from a concave mirror of focal length 20 cm?
Between which two points of concave mirror should an object be placed to obtain a magnification of:
(a) −3
(b) +25
(c) −0.4
An object is placed 15 cm from (a) a converging mirror, and (b) a diverging mirror, of radius of curvature 20 cm. Calculate the image position and magnification in each case.
Name the lens which can concentrate sun's rays to a point and burn a hole in a piece of paper.
Why does obtaining the image of the sun on paper with the help of a concave mirror burn the paper?
A _____________ mirror is used by a dentist.
A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at ______.
State whether the following statement is True or False
The sides of an object and its image formed by a concave mirror are always interchanged.
To obtain an image twice the size of the object, between which two points related to a concave mirror should an object be placed?
