Home
Class 10
PHYSICS
Concave lens : Negative focal leng...

Concave lens : Negative focal length :: convex lens …………..

Text Solution

Verified by Experts

Positive focal length : Focal length of a convex lens is positive according to cartesian sign convention.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • LENSES

    CHETAN PUBLICATION|Exercise Match the columns|6 Videos

  • LENSES

    CHETAN PUBLICATION|Exercise .True of .False..|8 Videos

  • LENSES

    CHETAN PUBLICATION|Exercise Assignment|14 Videos

  • HEAT

    CHETAN PUBLICATION|Exercise ASSIGNMENT - 5 (Answer the following: (Any 1))|3 Videos

  • MODEL ACTIVITY SHEET

    CHETAN PUBLICATION|Exercise SOLVE THE FOLLOWING QUESTIONS : (ANY 1)|9 Videos

Similar Questions

Explore conceptually related problems

The focal length of the lens is ….

The focal length of i1 convex lens is positive.

Knowledge Check

  • The focal length of a concave lens has ………sign.

    A
    negative
    B
    positive
    C
    positive or negative
    D
    none of the above

  • The sign of focal length of a convex lens is …….. Sign.

    A
    negative
    B
    positive
    C
    negative or positive
    D
    none of the above

  • Power of a lens is -4D , then its focal length is :

    A
    4m
    B
    `-40m`
    C
    `-0.25m`
    D
    `-2.5m`

    • Similar Questions

    Explore conceptually related problems

    If the distance D between an object and screen is greater than 4 times the focal length of a convex lens, then there are two positions of the lens for which images are formed on the screen. This method is called conjugate foci method. If d is the distance between the two positions of the lens, obtain the equation for focal length of the convex lens.

    If the distance D between an object and screen is greater than 4 times the focal length of a convex lens, then there are two positions of the lens for which images are formed on the screen. This method is called conjugate foci method. If d is the distance between the two positions of the lens, obtain the equation for focal length of the convex lens.

    If the distance D between an object and screen than 4 times the focal length of a convex lens, then there are two positions of the lens for which image are formed on the screen. This method is called conjugate method. If d is the distance between the two positions of the lens, obtain the equation for focal length of the convex lens.

    A beam of light converges to a point P , A lens is placed in the path of the convergent beams 12 cm from P. At what point does the beam converge if the lens is a. A convex lens of focal length 20 cm. b. A concave lens of focal length 16 cm ?

    The power of lens depends on the focal length of the lens

    Home
    Profile