A bi-convex lens is placed between a light source and a concave mirror as shwon such that image of the light source coincides with itself. Then,
light, after being refracted, may fall normally on the mirror
light, after being refracted, may fall at the pole of the mirror
source and its image coincide for two positive of source
none of the above
Normal incidence ⇒ normal reflection
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- Question 1 - Select One
A point object is placed at a distance of 12cm from a convex lens of focal length 10cm. On the other side of the lens, a convex mirror is placed at a distance of 10cm from the lens such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is
A20cmB25cmC15cmD30cm - Question 1 - Select One
A thin convex lens of focal length 30cm is placed in front of a plane mirror. An object is placed at a distance x from the lens (not in between lens and mirror ) so that its final image coincides with itself. Then, the value of x is
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An object is placed at a distance of 15cm from a convex lenx of focal length 10cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is
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A convex lens of focal length 40cm is held at a distance 12cm coaxially above a concave mirror of focale length 18cm.
Q. If the convex lens is replaced by a concave lens of focal llength 60cm, it gives rise to an image coincident with itself. then the value of d isA20cmB30cmC40cmD60cm
Similar Questions
A point object is placed at a distance of 12cm from a convex lens of focal length 10cm. On the other side of the lens, a convex mirror is placed at a distance of 10cm from the lens such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is
View SolutionA thin convex lens of focal length 30cm is placed in front of a plane mirror. An object is placed at a distance x from the lens (not in between lens and mirror ) so that its final image coincides with itself. Then, the value of x is
View SolutionDifferentiate between virtual image formed by a concave mirror and of a convex mirror.
View SolutionAn object is placed at a distance of 15cm from a convex lenx of focal length 10cm. On the other side of the lens, a convex mirror is placed at its focus such that the image formed by the combination coincides with the object itself. The focal length of the convex mirror is
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