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A plane wave front falls on a convex le...

A plane wave front falls on a convex lens. The emergent wave front is

A

Plane

B

Cylindrical

C

Spherical diverging

D

Spherical kconverging

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • When an object is placed between F and 2F in front of a convex lens, the image formed is

    A
    real and inverted
    B
    beyond 2F
    C
    magnified
    D
    all the above

  • A plane wave front of light is incident on a plane mirror. Intensity is maximum at P when

    A
    `costheta=(lamda)/(2d)`
    B
    `costheta=(3lamda)/(4d)`
    C
    `sectheta-costheta=(3lamda)/(4d)`
    D
    `sectheta-costheta=(lamda)/(2d)`

  • Where should an object be placed in front of a convex lens to get a real image of the size of the object ?

    A
    At the principal focus of the lens
    B
    At twice the focal length
    C
    At infinity
    D
    Between the optical centre of the lens and its principal focus.

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    A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens if the image is equal to the size of the objec ? Also, find the power of the lens.

    A point object is moving with speed u_(0) at a position somewhere between 2F and F in front of a convex lens. The speed of its image is

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