What is the focal length of the convex lens? ​

Answers

  • Réponse publiée par: reyquicoy4321

    For convex lens the focal length is positive. On the other hand, the focal length of concave lens is negative. Thus, for convex lens, the focal length is a distance over which all the parallel rays will converge. A certain point over that distance all the parallel rays will converge, that point is known as focal point.

    Explanation:

  • Réponse publiée par: reyquicoy4321

    answer:

    THE ANSWER IS D.

    Explanation:

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  • Réponse publiée par: tayis

    Focal length (shown in red) is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror — the point where parallel rays of light meet, or converge.

  • Réponse publiée par: nelspas422

    Focal length is the distance between the center of a convex lens or a concave mirror and the focal point of the lens or mirror  the point where parallel rays of light meet.

  • Réponse publiée par: JUMAIRAHtheOTAKU

    The answer is 33 cm.

    Explanation:

    We are asked to get the focal length of the convex mirror. We can do this using the mirror equation:

    \frac{1}{f}=\frac{1}{d_{o}}+\frac{1}{d_{i}}.

    In this particular problem

    {d_{i}} = -15 cm (distance of the image)

    {d_{o}} = 27.5 cm (distance of the object)

    note that we used the sign convention for this particular equation.

    {d_{i}} is negative (-) if the image is formed behind the mirror.

    Now, substituting the values that we have, we get:

    \frac{1}{f}=\frac{1}{d_{o}}+\frac{1}{d_{i}}.

    \frac{1}{f}=\frac{1}{27.5 cm}+\frac{1}{-15 cm}.

    \frac{1}{f}=-\frac{1}{33 cm}.

    f = -33 cm

    The sign just signifies that it is, in fact, a convex mirror.

    Therefore, the focal length of the convex mirror used is 33 cm.

    I hope this helps.

  • Réponse publiée par: kirbydimaranan
    The focal length of convex lens is positive
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What is the focal length of the convex lens? ​...