A convex lens of a focal length 10cm is used to obtain a magnified image. if half part of thispainted black hoe does it affect the focal length of the lens?TOP MATCHES

A convex lens of a focal length 10cm is used to obtain a magnified image. if half part of thispainted black hoe does it affect of the intensity of light

A convex lens of a focal length 10cm is used to obtain a magnified image. if half part of thispainted black hoe does it affect of the intensity of lig

A convex lens has a focal length of 15 cm. When an object AB is kept at x distance from the lens, then the image formed has magnification +3 but when the object is further displaced by y distance away from the lens as shown in the figure then image formed has magnification –3. ThenOne/More correct answer(s)A.Value of x is 7.5 cmB.Value of y is 10 cmC.Value of x is 10 cmD.Value of y is 20 cm

A convex lens has focal length of 10 cm. Find the size of the image (along with sign) if an object 2 cm high forms a real and inverted image at 20 cm from the lens.

A point source of light is kept at a distance of 30 cm, in front of a convex lens of focal length 20 cm. On the other side a concave lens is placed at 10 cm from the convex lens, such that the final rays become parallel to the principal axis. ThenOne/More correct answer(s)A.The focal length of the concave lens is 50 cmB.The focal length of the concave lens is 60 cmC.If the point source of light is kept at 20 cm, the second image will be formed at 50 cm from the concave lensD.If the point source of light is kept at 20 cm, the second image will be formed at infinity