A blue filter would allow
A blackboard looks black because it
When light strikes the far edge of a dense object, it refracts
The light that is refracted the most, is
To notice the rainbow, the rain should be
Light can only pass through
Sound is an example of a longitudinal wave because sound waves move forwards periodically displacing molecules in
The wave and a ray that could be present at the top and bottom of seven lights are
The objects that do not produce light look colored because they
If angle of incidence of light entering a dense object is zero, then light will
White light can also be made by
If light enters the glass with an angle of 42 degree or greater, the light will
We see yellow color in our eyes because
Due to large angle of incidence, the light
When red and green colors are mixed together, they form
The cones are sensitive to
When green and blue colors are combined together, they form
Each material has
If light enters the glass with an angle of 44 degree or greater, it
The critical angle for "Perspex" is
When light enters a dense medium, it
The critical angle for ice is
The speed of light in 'vacuum' is
'Refractive index' of quartz is
'Prisms' with total internal reflection are used in
The waves at the bottom of spectrum are
The objects that do not produce their own light are known as
The speed of light in soda-lime glass is
'Rainbows' can only be seen when the sun
The critical angle for diamond is
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