International Day of Light

Which object breaks up white light to show its different colors?

• Telescope

• Lens

• Prism

• Microscope

2. Why light is said to have a dual nature?

• It exhibits the properties of wave and particles

• It exhibits the properties of reflection and diffraction.

• It has both interference and polarisation effect.

• None of the above

How is the wavelength of light related to its frequency?

• Higher the frequency, the longer the wavelength.

• Higher the frequency, the shorter the wavelength

• The wavelength is equal to frequency

• The wavelength is not related to frequency

Which object reflects the light most?

• Black color object

• Red color object

• Yellow color object

• White color object

Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation

• Scattering

• Diffraction

• Interference

• Polarization

The sky would appear red instead of blue if

• Atmospheric particles scatter blue light more than red light

• Atmospheric particles scatter all colors equally

• Atmospheric particles scatter red light more than the blue light

• The sun was much hotter

When white light enters a prism, it gets split into its constituent colors.  This is due to

• High density of prism material

• Because υ is different for different λ

• Dispersion of light

• Velocity changes for different frequencies

Laser is very dangerous than ordinary light because

• of its high intensity

• It is having single wavelength

• It is a Photon

• None of these

Stars are not visible in the day time because

• Stars hide behind the sun

• Stars do not reflect sun rays during day

• Stars vanish during the day

• Atmosphere scatters sunlight into a blanket of extreme brightness through which faint stars cannot be visible

Colour of the sky is blue due to

• Scattering of light

• Total internal reflection

• Total emission

• None of the above