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Andhra Pradesh SSC (Class 10) Refraction of Light and Lenses — practice questions

Explore 140 free Refraction of Light and Lenses questions in Andhra Pradesh SSC (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 1–30 of 140.

As per your syllabus, if the radius of curvature of a spherical mirror is 20 cm, what is its focal length?Read the answer and worked solution →As per your syllabus, if a CONVEX MIRROR has R = 3.00 m, what is its FOCAL LENGTH (with sign)?Read the answer and worked solution →As per your syllabus, a convex mirror (R = 3 m, f = +1.5 m) has a bus at u = −5 m. What is the IMAGE distance v?Read the answer and worked solution →As per your syllabus, when light enters a DENSER medium from a rarer one (e.g. air to glass), how does it bend?Read the answer and worked solution →As per your syllabus, what is the speed of light in a VACUUM?Read the answer and worked solution →As per your syllabus, what is the refractive index of WATER?Read the answer and worked solution →As per your syllabus, what is the refractive index of DIAMOND — the HIGHEST among the common materials listed?Read the answer and worked solution →As per your syllabus, what is the OPTICAL CENTRE of a lens?Read the answer and worked solution →As per your syllabus, Physics, what is the LENS FORMULA?Read the answer and worked solution →As per your syllabus, what is the magnification (m) formula for a LENS — in terms of v and u?Read the answer and worked solution →As per your syllabus, a concave lens (f = −15 cm) forms an image at v = −10 cm. What is the object distance u?Read the answer and worked solution →As per your syllabus, for the same convex lens problem (f=+10, u=−15), what is the MAGNIFICATION?Read the answer and worked solution →As per your syllabus, what is 1 DIOPTRE — the SI unit of lens power?Read the answer and worked solution →Which property is true of an image formed by a plane mirror?Read the answer and worked solution →The principal focus of a spherical mirror, for small apertures, lies:Read the answer and worked solution →A spherical mirror has a radius of curvature of 24 cm. Its focal length is:Read the answer and worked solution →A concave mirror forms a tiny, real, inverted image at its focus when the object is placed:Read the answer and worked solution →An image formed by a convex mirror is always:Read the answer and worked solution →The mirror formula relating object distance u, image distance v, and focal length f is:Read the answer and worked solution →A concave mirror forms a virtual, erect image. The magnification m must be:Read the answer and worked solution →Light bends when it passes from one transparent medium to another. This phenomenon is called:Read the answer and worked solution →The refractive index of a medium is 1.5. The speed of light in this medium is:Read the answer and worked solution →The light-sensitive screen at the BACK of the eye, on which the image is formed, is called the:Read the answer and worked solution →The NEAR POINT (least distance of distinct vision) for a NORMAL adult eye is:Read the answer and worked solution →MYOPIA (short-sightedness) is corrected by using:Read the answer and worked solution →When white light passes through a PRISM, it splits into seven colours. This phenomenon is called:Read the answer and worked solution →A rainbow in the sky after a rain shower is formed by:Read the answer and worked solution →First law of reflection states angle of incidence equals:Read the answer and worked solution →A concave mirror's focal point F is located:Read the answer and worked solution →Refractive index n of a medium is defined as:Read the answer and worked solution →

Worked practice questions

As per your syllabus, if the radius of curvature of a spherical mirror is 20 cm, what is its focal length?

  1. 10 cm (since f = R/2)
  2. 20 cm
  3. 5 cm
  4. 40 cm
Show answer and solution

Correct answer: A. 10 cm (since f = R/2)

As per your syllabus, f = R/2 = 20/2 = 10 cm.

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As per your syllabus, if a CONVEX MIRROR has R = 3.00 m, what is its FOCAL LENGTH (with sign)?

  1. +1.50 m (convex mirror focal length is positive, F behind the mirror)
  2. −1.50 m
  3. −3.00 m
  4. +3.00 m
Show answer and solution

Correct answer: A. +1.50 m (convex mirror focal length is positive, F behind the mirror)

As per your syllabus, convex mirror R = +3.00 m, so f = +R/2 = +1.50 m.

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As per your syllabus, a convex mirror (R = 3 m, f = +1.5 m) has a bus at u = −5 m. What is the IMAGE distance v?

  1. Cannot be determined
  2. +1.15 m (image behind the mirror — virtual)
  3. −1.15 m
  4. +5.00 m
Show answer and solution

Correct answer: B. +1.15 m (image behind the mirror — virtual)

As per your syllabus, applying mirror formula gives v = +1.15 m (behind the mirror).

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