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BECE (Ghana) Telescopes — practice questions

Explore 2 free Telescopes questions in BECE (Ghana) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Telescopes questions and exercises with answers

Showing questions 1–2 of 2.

What does a refracting telescope use to collect and focus light?Read the answer and worked solution →Which part collects the light in a reflecting telescope?Read the answer and worked solution →

Worked practice questions

What does a refracting telescope use to collect and focus light?

  1. A mirror
  2. A prism
  3. A lens
  4. A screen
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Correct answer: C. A lens

1. Optical telescopes gather visible light from distant objects. 2. A refracting telescope does this with a large converging lens. 3. The lens bends the light inwards to a focus, where a second lens magnifies it. 4. A telescope built around a curved mirror is a reflecting telescope instead. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), 1. Refracting telescopes_

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Which part collects the light in a reflecting telescope?

  1. A curved lens
  2. A flat window
  3. A glass prism
  4. A curved mirror
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Correct answer: D. A curved mirror

1. A reflecting telescope was first built by Isaac Newton in the 1680s. 2. It uses a curved primary mirror instead of a large lens. 3. The mirror gathers the light and reflects it to a focus. 4. Because the light never passes through the glass, there is no colour blurring. _Source: Siyavula Natural Sciences Grade 8 (CC BY 4.0), 2. Reflecting telescopes_

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