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Light
B.Sc. B.Ed. Integrated
light.pptx
What you see in these picture?
What you see in these picture?
Luminous Objects
 Objects that produce their own light are
called Luminous Objects.
 Example, Sun, Fire
Non-Luminous Objects
 Objects that do not produce their own light but are
visible when reflect light falling on them are
called Non-Luminous Objects.
 Example - Table, planets.
Name an insect which is luminous.
Fill in the blank
- Objects that produce their own light are
called.
 Name some luminous objects & non luminous
objects.
Activity
Transparency
Name an object which can be
both opaque & translucent.
MCQ
Which types of objects do not allow light to pass
through them?
(a) Translucent
(b) Opaque
(c) Transparent
(d) Penumbra
light.pptx
Rectilinear propagation
 Light travels in a straight line. It is called rectilinear
propagation of light.
Reflection of light
light.pptx
MCQ
 Light travels in
(a) straight line
(b) curved line
(c) zig-zag line
(d) randomly
RECAPITULATION
 Define rectilinear propagation.
 Differentiate b/w non- luminous & luminous
 Explore about the transparency.
 Explain about the reflection.
 Value the importance of light in our daily
life.
HOME WORK
Q. Classify the objects or materials given below as opaque,
transparent or translucent and luminous or non-luminous:
Air, water, a piece of rock, a sheet of aluminium, a mirror, a
wooden board, a sheet of polythene, a CD, smoke, a sheet of
plane glass, fog, a piece of red hot iron, an umbrella, a lighted
fluorescent tube, a wall, a sheet of carbon paper. the flame of a
gas burner. a sheet of cardboard, a lighted torch, a sheet of
cellophane, a wire mesh, kerosene stove, sun. firefly, moon.
HOME WORK
Q. In a completely dark room, if you hold up a mirror in
front of you, will you see a reflection of yourself in the
mirror?
Q. Why should we not look at sun directly?
Q. What are incident ray & reflected ray?

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light.pptx

  • 3. What you see in these picture?
  • 4. What you see in these picture?
  • 5. Luminous Objects Objects that produce their own light are called Luminous Objects. Example, Sun, Fire
  • 6. Non-Luminous Objects Objects that do not produce their own light but are visible when reflect light falling on them are called Non-Luminous Objects. Example - Table, planets.
  • 7. Name an insect which is luminous.
  • 8. Fill in the blank - Objects that produce their own light are called. Name some luminous objects & non luminous objects.
  • 11. Name an object which can be both opaque & translucent.
  • 12. MCQ Which types of objects do not allow light to pass through them? (a) Translucent (b) Opaque (c) Transparent (d) Penumbra
  • 14. Rectilinear propagation Light travels in a straight line. It is called rectilinear propagation of light.
  • 17. MCQ Light travels in (a) straight line (b) curved line (c) zig-zag line (d) randomly
  • 18. RECAPITULATION Define rectilinear propagation. Differentiate b/w non- luminous & luminous Explore about the transparency. Explain about the reflection. Value the importance of light in our daily life.
  • 19. HOME WORK Q. Classify the objects or materials given below as opaque, transparent or translucent and luminous or non-luminous: Air, water, a piece of rock, a sheet of aluminium, a mirror, a wooden board, a sheet of polythene, a CD, smoke, a sheet of plane glass, fog, a piece of red hot iron, an umbrella, a lighted fluorescent tube, a wall, a sheet of carbon paper. the flame of a gas burner. a sheet of cardboard, a lighted torch, a sheet of cellophane, a wire mesh, kerosene stove, sun. firefly, moon.
  • 20. HOME WORK Q. In a completely dark room, if you hold up a mirror in front of you, will you see a reflection of yourself in the mirror? Q. Why should we not look at sun directly? Q. What are incident ray & reflected ray?