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प्रश्न
The spherical mirror used in a beauty parlour as make-up mirror is _______.
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उत्तर
The spherical mirror used in a beauty parlour as a make-up mirror is Concave mirror.
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संबंधित प्रश्न
A simple microscope is used by watch repairers. Give reason.
What is the relation between the focal length and radius of curvature of a spherical mirror (concave mirror or convex mirror)?
A lens forms a real image 3 cm high of an object 1 cm high. If the separation of object and image is 15 cm, find the focal length of the lens.
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:
(a) 50 cm
(b) 40 cm
(c) 60 cm
(d) 30 cm
Draw a ray diagram to show the formation of image by a concave mirror for the object beyond its centre of curvature. State three characteristics of the image.
The image formed by a convex mirror is of size one third the size of object. How are u and v related?
Draw a ray diagram to show the formation of the image, when the object is placed between optical centre and principal focus of a convex lens.
State the signs and values of magnifications in the above mentioned case.
A student traces the path of a ray of light passing through a rectangular slab.
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For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be ______.
