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ICSE Class 8 Light — practice questions

Explore 35 free Light questions in ICSE Class 8 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Light questions and exercises with answers

Showing questions 1–30 of 35.

Light changes direction on entering water obliquely. This is?Read the answer and worked solution →A ray enters glass along the normal. Its direction?Read the answer and worked solution →An oblique ray enters a medium where it travels slower. It bends?Read the answer and worked solution →A transmitted ray goes from water into air obliquely. It bends?Read the answer and worked solution →Viewed from above, a pond bottom usually appears?Read the answer and worked solution →A hot road seems wet although it is dry. The main cause?Read the answer and worked solution →We see sunrise before the Sun geometrically clears the horizon due to?Read the answer and worked solution →A glass prism separates white light into colours. This is?Read the answer and worked solution →Why do colours separate in an ordinary glass prism?Read the answer and worked solution →A mirror's reflecting surface curves inward. It is?Read the answer and worked solution →The reflecting surface of a convex mirror?Read the answer and worked solution →The central point on a spherical mirror's reflecting surface is its?Read the answer and worked solution →A spherical mirror's centre of curvature is the centre of?Read the answer and worked solution →Radius of curvature measures the distance from a mirror's pole to?Read the answer and worked solution →A spherical mirror's principal axis passes through?Read the answer and worked solution →A paraxial ray parallel to a concave mirror's axis reflects?Read the answer and worked solution →A ray through a concave mirror's centre of curvature reflects?Read the answer and worked solution →At a spherical mirror's pole, a ray makes 20° with its axis. Reflection?Read the answer and worked solution →A virtual image of an object in a convex mirror?Read the answer and worked solution →An arrow stands at C of a concave mirror. The optical image is?Read the answer and worked solution →Place an object between F and C. A concave mirror's optical image forms?Read the answer and worked solution →An object between a concave mirror's pole and focus forms?Read the answer and worked solution →Which description fits a convex mirror's optical image of a finite object?Read the answer and worked solution →Where does a concave mirror focus a very distant object's optical image?Read the answer and worked solution →As a toy recedes from a convex mirror, its optical image?Read the answer and worked solution →Convex rear-view mirrors help a driver mainly by providing?Read the answer and worked solution →For a parallel headlamp beam, a concave mirror's small source belongs?Read the answer and worked solution →For an erect, enlarged optical image in a shaving mirror, choose?Read the answer and worked solution →A real object forms a real image in a concave mirror. Its position?Read the answer and worked solution →For a concave mirror, which incident ray is paired wrongly?Read the answer and worked solution →

Worked practice questions

Light changes direction on entering water obliquely. This is?

  1. Absorption of light
  2. Scattering of light
  3. Reflection of light
  4. Refraction of light
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Correct answer: D. Refraction of light

Refraction redirects light as it passes between media in which its speed differs.

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A ray enters glass along the normal. Its direction?

  1. Remains along the normal
  2. Bends toward the normal
  3. Turns along the surface
  4. Bends away from the normal
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Correct answer: A. Remains along the normal

At perpendicular incidence the speed can change without changing the ray's direction.

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An oblique ray enters a medium where it travels slower. It bends?

  1. Along the boundary
  2. Towards the normal
  3. Back into the first medium
  4. Away from the normal
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Correct answer: B. Towards the normal

Light bends towards the normal when entering a medium where it travels more slowly.

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