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General Knowledge > General Science

MIRROR FORMULA BASED MCQs

Total Questions : 20 | Page 1 of 2 pages
Question 1. A ray of light is travelling from a rarer medium to a denser medium
  1.    goes straight into the second medium
  2.    bends towards the normal
  3.    bends away from the normal
  4.    does not enter at all
 Discuss Question
Answer: Option B. -> bends towards the normal
Question 2. A point object is placed at a distance of 20 cm from a convex mirror of focal length 20 cm
  1.    at infinity
  2.    at focus
  3.    at pole
  4.    behind the mirror.
 Discuss Question
Answer: Option D. -> behind the mirror.
Question 3. What does translucent mean?
  1.    Light can pass through it
  2.    No light can pass through it
  3.    some light can pass through it
  4.    none of the above
 Discuss Question
Answer: Option C. -> some light can pass through it
Question 4. A dentist uses a small dental mirror to help magnify teeth in your mouth
  1.    a convex mirror
  2.    a concave mirror
  3.    a convex lens
  4.    a concave lens
 Discuss Question
Answer: Option B. -> a concave mirror
Question 5. A concave mirror of focal length 20 cm forms an image having twice the size of object
  1.    25 cm
  2.    40 cm
  3.    10 cm
  4.    At infinity
 Discuss Question
Answer: Option C. -> 10 cm
Question 6. What colour is best to be seen in the dark?
  1.    yellow
  2.    black
  3.    grey
  4.    bright green
 Discuss Question
Answer: Option A. -> yellow
Question 7. What is reflective in our classroom?
  1.    lights
  2.    a book bag
  3.    computer
  4.    Mrs Gaunt
 Discuss Question
Answer: Option B. -> a book bag
Question 8. What does opaque mean?
  1.    Light can pass through it
  2.    No light can pass through it
  3.    some light can pass through it
  4.    All of above
 Discuss Question
Answer: Option B. -> No light can pass through it
Question 9. What is the ray of light that strikes the surface ?
  1.    normal ray
  2.    reflected ray
  3.    Incident ray
  4.    normal
 Discuss Question
Answer: Option C. -> Incident ray
Question 10. Where does light come from?
  1.    sun
  2.    light bulb
  3.    curtains
  4.    windows
 Discuss Question
Answer: Option A. -> sun

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