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  3. 10th Class
  4. Science
  5. Light - Reflection and Refraction

10th Class Science Light - Reflection and Refraction

  • question_answer 4)
    A spherical mirror and a thin spherical lens have each a focal length of – 15 cm. The mirror and lens are likely to be (a) Both concave (b) Both convex (c) Mirror is concave and lens is convex (d) Mirror is convex and lens is concave  

    Answer:

    (a) The focal length is taken as negative for both concave mirror and concave lens. 


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