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Tamil Nadu SSLC (Class 10) Ray Optics and Optical Instruments — practice questions

Explore 34 free Ray Optics and Optical Instruments questions in Tamil Nadu SSLC (Class 10) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Ray Optics and Optical Instruments questions and exercises with answers

Showing questions 1–30 of 34.

Judge these light bending claimsRead the answer and worked solution →Match lens setups to the image formedRead the answer and worked solution →Match materials to their refractive indexRead the answer and worked solution →Order the colours of the spectrumRead the answer and worked solution →Sort visible light from invisible raysRead the answer and worked solution →A convex lens is also called a:Read the answer and worked solution →The focal length of a concave lens is taken to be:Read the answer and worked solution →Power of a lens has the SI unit:Read the answer and worked solution →An object placed at 2F from a convex lens forms an image:Read the answer and worked solution →A concave lens always forms an image that is:Read the answer and worked solution →Power of a convex lens of focal length 50 cm is:Read the answer and worked solution →Magnification produced by a lens is given by:Read the answer and worked solution →An object placed at the focal point of a convex lens produces image:Read the answer and worked solution →For a convex lens, when the object is between F and 2F, the image is:Read the answer and worked solution →A convex lens is used as a magnifying glass. The object is placed:Read the answer and worked solution →Image distance v = +30 cm and object distance u = -10 cm. Magnification is:Read the answer and worked solution →An object 4 cm tall is placed 12 cm from a convex lens of focal length 8 cm. The image is:Read the answer and worked solution →Two thin lenses of focal lengths +20 cm and +25 cm are placed in contact. Power of combination:Read the answer and worked solution →A magnifying glass works best when the object is at:Read the answer and worked solution →If a convex lens is half covered with black paper, the image formed is:Read the answer and worked solution →A lens is held in water. Its focal length compared with that in air:Read the answer and worked solution →A real image of magnification 2 is formed by a convex lens of focal length 10 cm. Object distance is:Read the answer and worked solution →Power of a concave lens is:Read the answer and worked solution →An equiconvex thin lens has both surfaces of curvature 20 cm and refractive index 1.5. Its focal length is:Read the answer and worked solution →A real image of an object can be formed by:Read the answer and worked solution →If the focal length of a convex lens is doubled, its power:Read the answer and worked solution →Which is the principal use of a concave lens?Read the answer and worked solution →An object is placed beyond 2F from a convex lens. Image position is:Read the answer and worked solution →If both surfaces of a thin lens have equal radii of curvature R, the lens is called:Read the answer and worked solution →Image formed by a convex lens with object at infinity is:Read the answer and worked solution →

Worked practice questions

Judge these light bending claims

Read exercise and reference answers
Questions
  1. Statement is true
    Yes
    Statement
    Light bends towards the normal when entering a denser medium.
  2. Statement is true
    No
    Statement
    Frequency of light changes during refraction.
  3. Statement is true
    Yes
    Statement
    Refractive index of water is about 1.33.
  4. Statement is true
    No
    Statement
    Total internal reflection occurs when going from rarer to denser medium.
Instructions
Read each line about light bending as it passes between mediums, then tap true or false.

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Match lens setups to the image formed

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Matching pairs
  1. Left
    Convex lens (object beyond 2F)
    Right
    Real, inverted, diminished
  2. Left
    Convex lens (object between F and 2F)
    Right
    Real, inverted, magnified
  3. Left
    Convex lens (object within F)
    Right
    Virtual, erect, magnified
Instructions
Tap a lens with its object position, then tap the kind of image that setup makes.

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Match materials to their refractive index

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Matching pairs
  1. Left
    Water
    Right
    1.33
  2. Left
    Crown glass
    Right
    1.52
  3. Left
    Flint glass
    Right
    1.62
Instructions
Tap a material, then tap the refractive index that belongs to it.

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