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The danger signals installed at the top of tall buildings are red. These can be easily seen from a distance because among all other colours, the red light

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Important Questions on Light

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Science>Physics>Light>Sunlight - White or Coloured
The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :
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Science>Physics>Light>Sunlight - White or Coloured
An object of mass 15kg is moving with uniform velocity of 4m/s. What is the kinetic energy possessed by the object?
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Science>Physics>Light>Sunlight - White or Coloured
Flying birds has
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Science>Physics>Light>Sunlight - White or Coloured
While performing an experiment of dispersion of white light through a prism, four students represented the dispersion pattern as shown below. Identify the correct representation:
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Science>Physics>Light>Sunlight - White or Coloured
Which is the following colourful patterns is due to diffraction of light?
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Science>Physics>Light>Sunlight - White or Coloured
A force acting on a 20 kg mass changes its velocity from 6 m/s to 3 m/s. The work done by the force is :
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Science>Physics>Light>Sunlight - White or Coloured
A rod of length l and mass m fixed at one end, is hanging vertically. The other end is now raised so that the rod makes an angle 30° with horizontal line. The work done in the process will be :
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Science>Physics>Light>Sunlight - White or Coloured

Ratio of potential energies of body A and body B will be

Question Image

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Science>Physics>Light>Sunlight - White or Coloured
Formation of rainbow involves
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Science>Physics>Light>Sunlight - White or Coloured
A mixture of red, yellow and violet light is incident on one face of a prism, at an angle of incidence of 50°. The angle of emergence of the red beam from the other face is 58.56°. If the angular dispersion of the emerging beam is 4.62°, then
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Science>Physics>Light>Sunlight - White or Coloured
In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be
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Science>Physics>Light>Sunlight - White or Coloured
In which colour have maximum dispersion
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Science>Physics>Light>Sunlight - White or Coloured
Which of the following graphs best represent the graphical relationship between Kinetic Energy (K.E) and momentum (P) of a body in motion?
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Science>Physics>Light>Sunlight - White or Coloured
When white light passes through the prism, colour which deviates the least is:
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Science>Physics>Light>Sunlight - White or Coloured
1kWh equal to
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Science>Physics>Light>Sunlight - White or Coloured
How fast should a man weighing 600 N run to achieve a kinetic energy of 750 J. Take g=10 m s-2.
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Science>Physics>Light>Sunlight - White or Coloured
The work done to increase the velocity of a car from 30 km h-1 to 60 km h-1, if the mass of the car is 1500 kg, is:
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Science>Physics>Light>Sunlight - White or Coloured

When white light is incident on a blue pigment, which colours are reflected? 

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Science>Physics>Light>Sunlight - White or Coloured
The separation of a beam of light into its constituent wavelengths is called
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Science>Physics>Light>Sunlight - White or Coloured
The coloured substances which are used as a paint are known as pigments. In order to obtain various pigments, the subtractive method is used for mixing the pigments. Which of the following colour is not absorbed by yellow and blue pigments?