Quiz  /  Ray Optics Class 12 MCQ Questions With Answers

  • 1. 
    Which of the following can produce a real image (select all that apply)

  • plane mirror
  • concave lens
  • convex lens
  • All of above

  • 2. 
    Yuna is trying to find the magnification value for a magnifying glass. She pulls up a picture on her phone, holds the magnifying glass up to her phone, and finds the height of the image formed by the lens. What other information would she need to collect to be able to calculate the magnification value?

  • The height of the original object (the picture displayed on her phone)
  • The distance from the lens to the original object (the picture displayed on her phone)
  • The distance from the lens to the image formed by the lens
  • The diameter of the lens

  • 3. 
    The lens seen pictured here

  • is a diverging lens that only forms real, upright, reduced images
  • is a diverging lens that can only form virtual, upright, reduced images.
  • is a converging lens that can form both real and virtual images.
  • is a converging lens that can only form real, upright reduced images.

  • 4. 
    The real image of an object is located 45 cm away from a convex lens with a focal length of 10 cm. How far away is the object from the lens?

  • 12.9 cm
  • 0.08 cm
  • 35.0 cm
  • 40 cm

  • 5. 
    A magnifying glass is used to enlarge a 2-cm tall picture up to a height of 5.5 cm tall. What is the magnification of this lens, and what type of lens would make this image?

  • 0.36; convex
  • 0.36; concave
  • 2.75; convex
  • 2.75; concave

  • 6. 
    A 25.0 m object is placed 30.0 m from a convex lens, which has a focal length of 5.0 m. What is the distance of the image?

  • 6 m
  • 7 m
  • 8 m
  • 9 m

  • 7. 
    A lens that is thicker in the middle than on the outside is called ___.

  • diverging
  • concave
  • convex
  • achromatic

  • 8. 
    Focal length of a convex lens will be maximum for

  • Blue light
  • Yellow light
  • Green light
  • Red light

  • 9. 
    The angle of reflection is always equal to the angle of incidence.

  • True
  • False

  • 10. 
    What part of the electromagnetic spectrum can penetrate all human skin and soft tissue?

  • microwave
  • visible light
  • ultraviolet
  • x­ray

  • 11. 
    As the ray of light passes from air to glass, state how the wavelength of light changes.

  • wavelength increases
  • wavelength decreases
  • wavelength remains constant
  • wavelength decreases and then increases

  • 12. 
    Consider an extended object immersed in water contained in a plane trough. When seen from close to the edge of the trough the object looks distorted. Which of the following is not correct.

  • The apparent depth of the points close to the edge are nearer the surface of the water compared to the points away from the edge.
  • The angle subtended by the image of the object at the eye is smaller than the actual angle subtended by the object in air.
  • Some of the points of the object far away from the edge may not be visible because of total internal reflection.
  • Water in a trough acts as a lens and magnifies the object.

  • 13. 
    An object of height 1 cm is kept at a distance of 40 cm from a concave spherical surface (R = 20 cm) separating air and glass (μ = 1.33). The location of the image formed is:

  • - 32 cm
  • + 16 cm
  • -18 cm
  • + 26 cm

  • 14. 
    For a total internal reflection, which of the following is correct?

  • Light travels from rarer to denser medium.
  • Light travels from denser to rarer medium.
  • Light travels in air only.
  • Light travels in water only.

  • 15. 
    A ray of light is incident on a glass sphere of refractive index 1.5 . What should be the angle of incidence so that the ray which enters the sphere does not come out of the sphere?

  • Tan-1(2/3)
  • sin-1(2/3)
  • 900
  • cos-1(2/3)

  • 16. 
    A concave lens is in contact with a convex lens. The magnitude of the ratio of their focal lengths is 2/3. Their equivalent focal length is 30 𝑐𝑚. What are their individual focal lengths respectively?

  • −75,50
  • -10, 15
  • 75,50
  • −15,10

  • 17. 
    Which of the following statements is true about refraction?

  • Light does not bend as it passes from one medium to another.
  • Refraction is due to changes in temperature.
  • Light travels faster in glass than air.
  • Refraction is due to changes in the speed of light.

  • 18. 
    The angle of incidence for an equilateral prism is 600. What should be the refractive index of prism so that the ray is parallel to the base inside the prism?

  • 1.414
  • 1.732
  • 1.33
  • 9/8

  • 19. 
    Critical angle and refractive index are:

  • Directly related
  • Equal
  • Inversely related
  • None of these

  • 20. 
    Mark the correct options:

  • If the incident rays are converging, we have a real object.
  • If the final rays are converging, we have a real image.
  • The image of a virtual object is called a virtual image.
  • If the image is virtual, the corresponding object is called a virtual object.

  • 21. 
    The angle of incidence is equal to the angle of reflection

  • Law of Reflection
  • Law of Light
  • Incidence Ray
  • The Normal

  • 22. 
    Name the factors that affect the lateral displacement of light as it passes through a rectangular glass slab.

  • thickness of block
  • angle of incidence
  • refractive index of glass
  • All of above

  • 23. 
    A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. the power of the combination is : ______

  • - 1.5 D
  • -6.5 D
  • + 6.5 D
  • + 6,67 D

  • 24. 
    What type of reflection is shown in the image?

  • Regular reflection
  • Diffuse reflection
  • Total internal reflection

  • 25. 
    Magnification of lens can be represented as M = .......

  • h'/h
  • -v/u
  • h/h'
  • either (a) or (b)

  • 26. 
    A concave lens forms the image of an object such that the distance between the object and image is 10 cm and the magnification produced is 1/4. The focal length of the lens will be : __________

  • 8.6 cm
  • 6.2 cm
  • 10 cm
  • 4.4 cm

  • 27. 
    A real image is formed by a a convex lens, then it is put in contact with a concave lens and again a real image is formed. This image is : ______________

  • shift towards the lens system
  • shift away from the lens system
  • remain in its original position
  • shift to infinity

  • 28. 
    Mirage is a phenomenon due to:

  • Refraction of light
  • Reflection of light
  • Total internal reflection of light
  • Diffraction of light
Report Question
warning
access_time
  Time