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10 questions
Rectilinear propagation of light means
light bends after striking a smooth surface
light travels in a straight line
light travels in a curvilinear line
both a and b
which of the characteristics is not exhibited by the shadow of an object?
erect
can be formed on screen
same colour as the object
can be bigger than the object
which of the following objects can cast a dark shadow?
a lighted bulb
a wooden door
a glass pane
both a and b
A plane mirror form an image of an object because it ........ light from the object
absorbs
reflects
passes
emits
which of these are required to form the shadow of a ball
torch
ball
screen
all of these
which of the following the non-luminous obejct
sun
moon
stars
firefly
which of the following is an example of an opaque object
clean water
plastic wrap
cardboard sheet
spectacle glass
divergent ray is
none of these
Image formed in a pinhole camera is
erect
inverted
parallel
none of these
Bending of light is called
reflection
refraction
dispersion
scattering
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