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PHYSICS, M3 EQ-Bank 6

An arrow of height 2 cm is placed 6 cm in front of a biconvex lens of focal length 3cm.

  1. Draw a principle ray diagram to show the image that is formed.   (3 marks)

         

  1. Is the image real or virtual and give a reason for your answer.   (2 marks)
  1. Use the principle ray diagram to determine the size of the image.   (1 mark)
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a.  
       

b.   The image is real.

  • The rays of light from the arrow are bent toward each other by the lens and actually converge on the opposite side of the lens.
  • Because the rays physically meet, a real image is formed.

c.    The size of the image is 2 cm.

Show Worked Solution

a.    
       
 

b.   The image is real.

  • The rays of light from the arrow are bent toward each other by the lens and actually converge on the opposite side of the lens.
  • Because the rays physically meet, a real image is formed.

c.    The size of the image is 2 cm.

PHYSICS, M3 EQ-Bank 10 MC

A candle is placed in front of a concave mirror, positioned beyond the centre of curvature.


Which of the following best describes the image formed by the mirror?

  1. Real, diminished and inverted
  2. Real, magnified and upright
  3. Virtual, diminished and upright
  4. Virtual, magnified and inverted
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\(A\)

Show Worked Solution

When an object is placed beyond the centre of curvature of a concave mirror, the image formed is:

  • Real – because the reflected rays converge.
  • Inverted – the image appears upside down relative to the object.
  • Diminished – the image is smaller than the object.

\(\Rightarrow A\)