Light travels in
  • straight line
  • curved line
  • zig-zag line
  • randomly
When an opaque object comes in the path of light it forms
  • an image with colours
  • shadow
  • black and white image
  • depends on the colour of the light
Which types of objects do not allow light to pass through them?
  • Translucent
  • Opaque
  • Transparent
  • Penumbra
Which is an example of a translucent object?
  • A thin sheet of paper
  • A thin glass slab
  • A thin iron sheet
  • All of these
Bouncing back of light from shining surfaces is called
  • Reflection
  • Refraction
  • Bending
  • Dispersion
What is lateral inversion?
  • Image becomes inverted
  • Image bends laterally
  • Right of the object appears left of the image
  • All of these happen
Which letters of English alphabet will not show lateral inversion?
  • I, O, U
  • N, Z, X
  • I, X, E
  • A, E, I
Which is a device to image the sun?
  • Plane mirror
  • Pinhole camera
  • A straight pipe
  • Glass slab
Which of the following is a cold source of light?
  • Firefly (Jugnu)
  • Tube light
  • The sun
  • Electric bulb
Out of these, which one is not a man-made luminous body?
  • Electric bulb
  • Burning candle
  • Firefly (Jugnu)
  • Oil lamp
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