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Light Mirrors and Lenses

Science · Class 8 · All

ScienceClass 8AllMedium
Q1/15
45s

Which part of the human eye acts like a convex lens?

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All 15 questions in this quiz

  1. Which statement about light is correct?

    1. Light always travels in a curved path.
    2. Light travels in a straight line in a uniform medium.
    3. Light cannot be reflected.
    4. Light travels only through solids.

  2. Which of the following is an example of regular reflection?

    1. Reflection from rough paper
    2. Reflection from a calm mirror surface
    3. Reflection from a wall
    4. Reflection from cloth

  3. Which part of the human eye acts like a convex lens?

    1. Retina
    2. Cornea only
    3. Eye lens
    4. Iris

  4. Which mirror is used as the reflector in vehicle headlights and torches?

    1. Plane mirror
    2. Convex mirror
    3. Concave mirror
    4. Glass slab

  5. Which optical device uses multiple reflections to produce beautiful patterns?

    1. Telescope
    2. Kaleidoscope
    3. Microscope
    4. Binoculars

  6. A concave lens causes parallel rays of light to:

    1. Converge at a point
    2. Diverge away from each other
    3. Stop completely
    4. Reflect backward

  7. The image formed by a plane mirror is:

    1. Laterally inverted
    2. Upside down
    3. Smaller than the object
    4. Real

  8. Which lens is used in a magnifying glass?

    1. Concave lens
    2. Convex lens
    3. Plane glass
    4. Cylindrical lens

  9. Which lens is used to correct short-sightedness (myopia)?

    1. Convex lens
    2. Concave lens
    3. Plane mirror
    4. Convex mirror

  10. Which type of lens is thicker at the centre than at the edges?

    1. Concave lens
    2. Convex lens
    3. Cylindrical lens
    4. Plane lens

  11. Which mirror always forms a diminished image?

    1. Plane mirror
    2. Concave mirror
    3. Convex mirror
    4. Any mirror

  12. Which mirror is used by dentists to examine teeth?

    1. Plane mirror
    2. Convex mirror
    3. Concave mirror
    4. Glass slab

  13. Which mirror is commonly used as a rear-view mirror in vehicles?

    1. Plane mirror
    2. Concave mirror
    3. Convex mirror
    4. Cylindrical mirror

  14. A plane mirror always forms an image that is:

    1. Real and inverted
    2. Virtual, erect, and of the same size as the object
    3. Real and magnified
    4. Virtual and inverted

  15. Which of the following is the correct law of reflection?

    1. Angle of incidence is greater than the angle of reflection.
    2. Angle of incidence is equal to the angle of reflection.
    3. Angle of incidence is always 90°.
    4. Angle of reflection is always 45°.