Q.11)-Light scattering takes place in
- Colloidal solutions
- Acidic solutions
- Electrolyte solutions
- Basic solutions
Q.12)-Which of the following statements is true when we see rainbow?
- We face sun and raindrops
- The sun remains behind as and we face raindrops
- In light rainfall, we face sun
- The sky remains clear and the sun is at lower position in the sky
Q.13)-A soap bubble shows colors when illuminated with white light.The is due to
- Diffraction
- Polarisation
- Interferenece
- Reflection
Q.14)-The formation of rainbow takes place, when sunlight
- Scattered due to the reflection from water drops in atmosphere
- Scattered due to refraction from water drops in atmosphere
- Scattered due to refraction and total internal reflection from water drops
- None of the above
Q.15)-The rainbow has( choose incorrect statement)
- Violet light as its innermost color towards earth
- Its curvature bends towards earth
- Red light as its outermost color toward sky
- Red light as its innermost color towards earth
Q.16)-On a rainy day small oily films on water shows brilliant color.This is due to
- Scattering
- Dispersion
- Interferenece
- Polarization
Q.17)-An optically plane surface reflects a beam of light
- As a parallel beam in one direction
- As diffused beams in all directions
- As parallel beams in all direction
- As a diffused beam in one direction
Q.18)-Which one of the following reflects back more sunlight as compared to other three?
- Sand desert
- Land covered with fresh snow
- Prairie land
- Paddy crop land
Q.19)-Purpose of an optical fibre is to
- Reflect light of different colors
- Dispense light into component colors
- Refract light of different colors
- Transmit light of different colors
Q.20)-The phenomenon which causes mirage is
- Interference
- Diffraction
- Polarization
- Total internal reflection