Quiz  /  Ray Optics Class 10 MCQ Questions With Answers

  • 1. 
    The Law of Reflection: The angle of incidence is _________ the angle of reflection

  • bigger than
  • the same as
  • smaller than

  • 2. 
    Images seen in a plane mirror are always

  • Upright and Virtual
  • Upright and Real
  • Inverted and Virtual
  • Farther and Virtual

  • 3. 
    How is scattering of light proportional to wavelength

  • Directly
  • Inversely
  • Does not depend
  • None of these

  • 4. 
    The larger the index of refraction the ...

  • larger the critical angle
  • smaller the critical angle
  • no change to the critical angle
  • what?!

  • 5. 
    Light of which color is deviated the least in image

  • Violet
  • Yellow
  • Red
  • All of above

  • 6. 
    Twinkling of stars is due to

  • Scattering of light
  • Reflection of light
  • Refraction of light
  • All of above

  • 7. 
    An object is held 9cm from a convex mirror and produces an image 6cm tall that is 4cm away from the mirror. What is the height of the object?

  • -13.5 cm
  • 13 cm
  • 2.7 cm
  • -2.7 cm

  • 8. 
    An incident ray that is parallel to the principal axis...

  • will reflect parallel to the principal axis
  • will refract through the focal point
  • will reflect through the center of curvature
  • will continue along the same path through the lens

  • 9. 
    Mirrors that bulge out are called:

  • Concave mirrors
  • Convex mirrors

  • 10. 
    For total internal reflection to take place ray of light should go from

  • Rarer to denser medium
  • Denser to rarer medium

  • 11. 
    True or False:We see colors because those colors are reflected back to our eyes.

  • True
  • False

  • 12. 
    Light produced by an object due to being a very high temperature is called

  • fluorescent
  • electric discharge
  • incandescent
  • triboluminescence

  • 13. 
    Which ways does light bend going from air to water?

  • away from the normal
  • towards the normal
  • does not ben

  • 14. 
    You have cool glow-in-the-dark stickers of Mickey Mouse. This is an example of

  • fluorescence
  • chemiluminescence
  • phosphorescence
  • incandescence

  • 15. 
    Which type of mirror magnifies a close up image, like a make-up mirror.

  • Concave
  • Convex
  • Specular
  • Plane

  • 16. 
    A real image is formed in plane mirror.

  • True
  • False

  • 17. 
    Which picture represents what happens when light travels through a CONVERGING lens?

  • A- left picture
  • B - Right picture

  • 18. 
    An object is located 30 cm from a concave mirror. The mirror forms a real image at a distance of 20 cm. What is the focal length of this mirror?

  • 13.5 cm
  • 0.0833 cm
  • 12.0 cm
  • 8.7 cm

  • 19. 
    A magnifying glass is an example of what type of lens?

  • convex
  • concave
  • mirror
  • Cylinder

  • 20. 
    If frequency increases, wavelength ____

  • increases
  • decreases
  • stays the same
  • None of these

  • 21. 
    Speed of light in a vacuum is

  • represented by the symbol "c"
  • 3.00 X108 m/s
  • both answers are correct
Report Question
warning
access_time
  Time