Spherical Mirrors and Lenses in Science 158 Rationalised 2023-24
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Questions and Answers

Which path will a ray parallel to the principal axis follow after reflection in a concave mirror?

  • Appear to diverge from the principal focus
  • Pass through the principal focus (correct)
  • Emerge parallel to the principal axis
  • Reflect back along the same path

    • What happens to a ray directed towards the principal focus of a convex mirror after reflection?

  • Diverges from the principal focus (correct)
  • Emerges parallel to the principal axis
  • Reflects back along the same path
  • Passes through the principal focus

    • What path will a ray passing through the centre of curvature of a concave mirror follow after reflection?

  • Pass through the principal focus
  • Diverge from the principal focus
  • Emerge parallel to the principal axis
  • Reflect back along the same path (correct)

    • How are the incident and reflected rays oriented with respect to the principal axis in the case of oblique incidence towards the pole of a mirror?

    <p>Make equal angles with the principal axis</p> Signup and view all the answers

    What is the general behavior of light rays with regard to following the laws of reflection in all cases described?

    <p>They follow the laws of reflection</p> Signup and view all the answers

    Which incident ray orientation results in emerging rays that are parallel to the principal axis in the case of a convex mirror?

    <p>Ray directed towards the principal focus</p> Signup and view all the answers

    What is common among all types of reflecting surfaces?

    <p>They obey the laws of reflection</p> Signup and view all the answers

    What is the relationship between the focal length of a spherical mirror and its radius of curvature?

    <p>The focal length is equal to half the radius of curvature</p> Signup and view all the answers

    What happens to a light ray when it travels obliquely from a denser medium to a rarer medium?

    <p>It bends away from the normal</p> Signup and view all the answers

    What is the speed of light in vacuum?

    <p>3×108 m s-1</p> Signup and view all the answers

    What is the refractive index of a transparent medium?

    <p>The ratio of the speed of light in vacuum to that in the medium</p> Signup and view all the answers

    What is the direction of the emergent ray in a rectangular glass slab?

    <p>Parallel to the direction of the incident ray</p> Signup and view all the answers

    What is the primary condition for the laws of reflection to be applicable?

    <p>The incident ray, the normal to the mirror, and the reflected ray lie in the same plane</p> Signup and view all the answers

    What is the relationship between the angle of incidence and the angle of reflection?

    <p>The angle of incidence is equal to the angle of reflection</p> Signup and view all the answers

    What is the orientation of the incident ray, the normal to the mirror, and the reflected ray?

    <p>They all lie in the same plane</p> Signup and view all the answers

    What is the shape of the surface required for the laws of reflection to be applicable?

    <p>Any shape is acceptable</p> Signup and view all the answers

    What is the purpose of a highly polished surface in relation to reflection?

    <p>To reflect most of the light falling on it</p> Signup and view all the answers

    What is the relevance of the laws of reflection in understanding optical phenomena in nature?

    <p>They are essential in understanding some of the optical phenomena in nature</p> Signup and view all the answers

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