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CBSE Class 10 Refraction of Light and Lenses — practice questions — page 7

Explore 227 free Refraction of Light and Lenses questions in CBSE Class 10 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Refraction of Light and Lenses questions and exercises with answers

Showing questions 181–210 of 227.

The line through the pole and the centre of curvature is the:Read the answer and worked solution →Convex mirrors are preferred for rear-view because the image is always:Read the answer and worked solution →The set of sign conventions used for mirrors is called:Read the answer and worked solution →The distance of the object from the pole is called the object:Read the answer and worked solution →The distance of the principal focus from the pole is the:Read the answer and worked solution →The mirror formula is valid for:Read the answer and worked solution →Magnification is the ratio of the height of the image to the height of the:Read the answer and worked solution →A concave mirror focusing sunlight on paper makes the paper:Read the answer and worked solution →Concave mirror or convex mirror?Read the answer and worked solution →Match each term to its meaningRead the answer and worked solution →True or false about mirrorsRead the answer and worked solution →Fill the gaps on spherical mirrorsRead the answer and worked solution →Sort each symbol by what it namesRead the answer and worked solution →Order the steps of a mirror problemRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →Pick the right answer, quicklyRead the answer and worked solution →The absolute refractive index of a medium is simply called its:Read the answer and worked solution →The refractive index of water is:Read the answer and worked solution →A lens thicker at the middle than at the edges is called:Read the answer and worked solution →A convex lens is also known as a:Read the answer and worked solution →A lens thicker at the edges than at the middle is called:Read the answer and worked solution →A concave lens spreads light rays and so is said to:Read the answer and worked solution →How many spherical surfaces does a lens have?Read the answer and worked solution →The centres of the spheres forming a lens are called centres of:Read the answer and worked solution →The power of a lens is defined as the reciprocal of its:Read the answer and worked solution →The power of a lens is represented by which letter?Read the answer and worked solution →The SI unit of the power of a lens is the:Read the answer and worked solution →One dioptre is the power of a lens whose focal length is:Read the answer and worked solution →The power of a convex lens is:Read the answer and worked solution →The power of a concave lens is:Read the answer and worked solution →

Worked practice questions

The line through the pole and the centre of curvature is the:

  1. Principal arc
  2. Principal area
  3. Principal axis
  4. Principal angle
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Correct answer: C. Principal axis

1. It runs straight through the mirror. 2. It is taken as the x-axis in the sign convention. 3. It is the principal axis. _Source: syllabus Science, Ch 10 'Light - Reflection and Refraction'_

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Convex mirrors are preferred for rear-view because the image is always:

  1. Erect
  2. Equal
  3. Empty
  4. Exact
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Correct answer: A. Erect

1. The driver must see traffic behind. 2. An upside down image would be useless. 3. The image is always erect. _Source: syllabus Science, Ch 10 'Light - Reflection and Refraction'_

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The set of sign conventions used for mirrors is called:

  1. New Central
  2. New Cartesian
  3. New Cardinal
  4. New Circular
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Correct answer: B. New Cartesian

1. It fixes how distances are signed. 2. The pole is taken as the origin. 3. It is the New Cartesian Sign Convention. _Source: syllabus Science, Ch 10 'Light - Reflection and Refraction'_

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