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How is a lens different from a mirror ?...

How is a lens different from a mirror ?

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A mirror has one reflecting surface . By reflection of light, it forms an image of the object placed in front of it. A mirror is not transparent . A lens has two surfaces that form an image by refraction of light. A lens is transparent.
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Write the formula for a lens connnecting image distance (v), object distance (u) and the focal length (f). How does the lens formula differ from the mirror formula?

How is the refraction of light ray from a plane mirror different from the refraction of light ray as it enters a block of glass?

Knowledge Check

  • The distance between a convex lens and a plane mirror is 10 cm. The parallel rays incident on the convex lens after reflection from the mirror forms image at the potical centre of the lens. Focal length of lens will be

    A
    10 cm convex and 15 cm concave
    B
    20 cm
    C
    30 cm
    D
    cannot be determined

  • A thin convex lens of focal length 30 cm 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

    A
    `15 cm`
    B
    `30 cm`
    C
    `60 cm`
    D
    Insufficient data

    • Similar Questions

    Explore conceptually related problems

    The distance between a convex lens and a plane mirror is 15 cm. The parallel rays incident on the convex lens, after reflection from the mirror, form image at the optical centre of the lens. Draw the ray-diagram and find out the focal length of the lens.

    A convex lens of focal length 15cm and a concave mirror of focal length 30cm are kept with their optic axes PQ and RS paralledl but separated in vertical direction by 0.6 cm as shown in Figure. The distance between the lens and mirror is 30cm. An upright object Ab of height 1.2 cm is placed on the optics axis PQ of the lens at a distance of 20 cm from the lens. If A^(')B^(') is the image after refraction from the lens and reflection from the mirror, find the distance of A^(')B^(') from the pole of the mirror and obtain its magnification. Also, locate positions of A^(') and B^(') with respect to the optic axis RS.

    A convex lens of focal length 15cm and a concave mirror of focal length 30cm are kept with their optic axes PQ and Rs parallel but separated in vertical directions by 0.6cm as shown .the distance between the lens and mirror is 30cm An upright object AB of height 1.2cm is placed on the optic axis PQ of the lens at the distance of 20cm from the lens.If AB is the image after refraction from the lens and reflection from the mirror ,find the distance AB from the pole of the mirror ,and obtain its magnification .Also locate positions of AB with respect to the optic axis RS

    A convex lens of focal length 15 cm and a concave mirror of focal length 30 cm are kept with their optic axis PQ and RS parallel but separated in vertical directiion by 0.6 cm as shown . The distance between the lens and mirror is 30 cm . An upright object AB of height 1.2 cm is placed on the optic axis PQ of the lens at a distance of 20 cm from the lens . if A'B' is the image after refraction from the lens and the reflectiion from the mirror , find the distance of A'B' from the pole of the mirror and obtain its magnification . Also locate positions of A' and B' with respect to the optic axis RS.

    A concave lens focal length 10 cm is placed on the axis of concave mirror of 10 cm radius at a distance of 5 cm from the mirror. An object is placed so that the light coming from it first passes through the lens, the gets reflected from the mirror, again passes through the lens to form an inverted image coincident with the object itself. Determine the position of the object.

    A converging lens of focal length 15 cm and a converging mirror of focal length 10 cm are placed 50 cm apart. If a pin of length 2.0 cm is placed 30 cm from the lens farther away from the mirror, where will the final image form and what will be the size of the final image ?

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