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Andhra Pradesh SSC (Class 10) Ray Optics and Optical Instruments — practice questions — page 2

Explore 34 free Ray Optics and Optical Instruments questions in Andhra Pradesh SSC (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 31–34 of 34.

A virtual image:Read the answer and worked solution →Two lenses of powers +3 D and -5 D are placed in contact. The combination:Read the answer and worked solution →Cross-section of a convex lens looks like:Read the answer and worked solution →Linear magnification produced by a converging lens for an object at 2F is:Read the answer and worked solution →

Worked practice questions

A virtual image:

  1. Can be captured on a screen
  2. Is always inverted
  3. Cannot be captured on a screen
  4. Is always smaller than the object
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Correct answer: C. Cannot be captured on a screen

1. A virtual image forms where rays appear to diverge from. 2. No actual rays meet at that point. 3. So a screen placed there receives no real image. 4. Virtual images can only be seen by the eye. _Source: Selina Concise Physics ICSE Class 10, Ch 5 'Refraction through a Lens' (aplustopper.com extract)_

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Two lenses of powers +3 D and -5 D are placed in contact. The combination:

  1. Behaves like a convex lens of power +2 D
  2. Has no focal length
  3. Is opaque
  4. Behaves like a concave lens of power -2 D
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Correct answer: D. Behaves like a concave lens of power -2 D

1. For lenses in contact, total power is P = P1 + P2. 2. P = (+3) + (-5) = -2 D. 3. Negative net power means a diverging (concave) lens. 4. So the combination behaves like a concave lens of -2 D. _Source: Selina Concise Physics ICSE Class 10, Ch 5 'Refraction through a Lens' (aplustopper.com extract)_

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Cross-section of a convex lens looks like:

  1. Two outward-bulging surfaces
  2. Two flat surfaces
  3. Two inward-curving surfaces
  4. Half disc
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Correct answer: A. Two outward-bulging surfaces

1. A convex lens is thicker at the centre than the edges. 2. Both surfaces curve outwards (away from the centre). 3. So its cross-section shows two outward-bulging surfaces. 4. A concave lens has two inward-curving surfaces. _Source: Selina Concise Physics ICSE Class 10, Ch 5 'Refraction through a Lens' (aplustopper.com extract)_

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