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प्रश्न
Find the height of the image of a body of height 1.5m in a mirror with a magnification of 1.5.
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उत्तर
Mirror formula is the relation between the focal length f of the mirror, the distance u of the object from the pole of the mirror, and the distance v of the image from the pole.
Mirror formula is
1/v +1/u = 1/f.
Size of body = 1.5 m.
Magnification of body = 1.5.
Magnification = height of image / height of object.
Height of image = magnification x height of object.
Height of image = 1.5 x 1.5= 2.25 m.
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संबंधित प्रश्न
Define the following term in the context of spherical mirrors:- Centre of curvature
Explain the following term related to spherical lenses:- principal axis
An image that cannot be obtained on a screen is called ______.
Which type of mirror can form a real image?
- A small object is placed 150 mm away from a diverging lens of focal length 100 mm.
- Copy the figure below and draw rays to show how an image is formed by the lens.
- Calculate the distance of the image from the lens by using the lens formula.
- Copy the figure below and draw rays to show how an image is formed by 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).
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
How is a spherical mirror used to diverge a beam of light from a point? Name the type of mirror used.
How is the focal length of a spherical mirror related to its radius of curvature?
What is “aperture”?
