Sample paper for Class 10 RBSE Science book chapter 10, Light Reflection and Refraction .

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 Sample paper for Class 10 RBSE Science book chapter 10, Light Reflection and Refraction



Multiple choice questions:

  1. Which of the following is a property of light?

    • It travels in waves.
    • It travels faster in matter than in a vacuum.
    • It can be reflected, refracted, diffracted, and absorbed.
    • All of the above

  2. The angle of incidence is equal to the angle of:

    • Reflection
    • Refraction
    • Diffraction
    • Absorption

  3. When light travels from air to water, it bends:

    • Towards the normal
    • Away from the normal
    • Neither towards nor away from the normal

  4. The focal length of a concave mirror is:

    • The distance between the mirror and its pole
    • The distance between the mirror and its focus
    • The distance between the mirror and its center of curvature
    • None of the above

  5. The image formed by a convex lens is:

    • Real and inverted
    • Real and upright
    • Virtual and inverted
    • Virtual and upright

Short answer questions:

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  1. What are the laws of reflection?
  2. What is Snell's law?
  3. What is the difference between a real image and a virtual image?
  4. What are the focal lengths of concave and convex mirrors?
  5. What are the focal lengths of convex and concave lenses?

Long answer questions:

  1. Describe the formation of images by spherical mirrors and lenses using ray diagrams.
  2. Explain the working principle of a microscope.
  3. Explain the working principle of a telescope.
  4. Explain the working principle of a camera.

Answer key:

Multiple choice questions:

  1. (d)
  2. (a)
  3. (a)
  4. (b)
  5. (a)

Short answer questions:

  1. The laws of reflection are:
    • The angle of incidence is equal to the angle of reflection.
    • The incident ray, the reflected ray, and the normal to the surface all lie in the same plane.
  2. Snell's law is a relationship between the angles of incidence and refraction of light when it travels from one medium to another. It states that:
n1 * sin(i) = n2 * sin(r)

where n1 and n2 are the refractive indices of the two media, and i and r are the angles of incidence and refraction, respectively.

  1. A real image is formed when the light rays from the object actually converge at a point. A virtual image is formed when the light rays from the object appear to converge at a point, but do not actually do so.

  2. The focal length of a concave mirror is negative. The focal length of a convex mirror is positive.

  3. The focal length of a convex lens is positive. The focal length of a concave lens is negative.

Long answer questions:

  1. The formation of images by spherical mirrors and lenses can be explained using ray diagrams. A ray diagram is a sketch that shows the paths of light rays as they travel through a system of lenses or mirrors. To construct a ray diagram for a spherical mirror or lens, follow these steps:

  2. Draw the mirror or lens.

  3. Draw the object.

  4. Draw two rays of light from the top of the object.

  5. Draw the reflected or refracted rays of light.

  6. The point where the reflected or refracted rays intersect is the image of the object.

  7. A microscope is an optical instrument that is used to magnify small objects. It consists of two lenses: an objective lens and an eyepiece lens. The objective lens is located close to the object and forms a real image of the object. The eyepiece lens is located close to the eye and magnifies the real image formed by the objective lens.

  8. A telescope is an optical instrument that is used to magnify distant objects. It consists of two lenses: an objective lens and an eyepiece lens. The objective lens is located at the front of the telescope and forms a real image of the distant object. The eyepiece lens is located at the back of the telescope and magnifies the real image formed by the objective lens.

  9. A camera is an optical instrument that is used to capture images on film or digital sensors. It consists of a lens, a shutter, and a diaphragm. The lens focuses the light from the object onto the film or digital sensor. The shutter controls the amount of time that the light is allowed to expose the film or digital sensor. The diaphragm controls the amount of light that is allowed to pass through the lens.

I hope this helps!

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