Linear magnification M is not always the most useful measure of magnifying power. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? A concave lens causes light to converge. Thus, m = or m = Where, h 2 = size of image h 1 = size of object. First, what is a thin lens? Therefore, the magnification produced by a concave lens is always less than 1. gunduravimudhiraj76 gunduravimudhiraj76 Answer: Magnification of a concave lens or a convex mirror is always positive because they always form virtual and erect images. Concave lenses always produce images that are upright, virtual, reduced in size, and located on the object's side of the lens. It is used to controlling the laser beam. Note: - If magnification (m) is positive, It means image formed is virtual and erect If magnification (m) is negative, It means image formed is real and inverted Questions Example 10.3 - A concave lens has focal length of 15 cm. It is a combination of a lens with one convex lens and one concave lens side that is concave-convex lens … It can be used to balance out the spherical aberrations caused by other lenses. CBSE > Class 10 > Science 3 answers; Abhay Soni 3 weeks, 4 days ago (a) This is because a concave lens forms a virtual and erect image for any position of the object. Concave-convex Lens: It is curved inwards from one side and outwards from one side. An aspheric biconvex lens. Magnification produced by a concave lens is always? ... A convex plus a concave lens (f 1 > 0 > f 2) produces a positive magnification and the image is upright. Non spherical types. The magnification of a lens may be defined as the ratio of the size (height) of the image to the size (height) of the object. ... 22.A convex lens produces a magnification of +5. $$\text{Lens Formula: }\frac{1}{u}+\frac{1}{v}=\frac{1}{f}$$ The lens formula may be applied to convex lenses as well as concave lenses provided the ‘real is positive’ sign convention is followed. The following typical equation is used to determine a relation between the focal length of the lens, the distance of the object, and the distance of the image. True Question 10 The wavelength of light in a medium is ____ the wavelength of light in a vacuum. The magnification of a lens is represented by the letter ‘m’. linear magnification of a concave lens is always positive and where as that of convex lens has both positive and negative why Report ; Posted by Nikki Jaiswal 3 weeks, 4 days ago. longer than shorter than equal to inversely proportional to Question 11 A concave lens always produces what type of image? 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