Short Answer Questions: Light and Shadow | Science Class 5 PDF Download

Q1: What is light energy?
Ans: Light energy is a form of energy that enables us to see. It is emitted from sources such as the Sun.

Q2: Does light travel in a straight line?
Ans: Yes, light travels in a straight line. This is known as rectilinear propagation of light.

Q3: Name an example of a luminous object.
Ans: The Sun is an example of a luminous object because it emits both light and heat.

Q4: What are transparent objects?
Ans: Transparent objects allow light to pass through them without getting scattered. An example is glass.

Q5: Explain how shadows are formed.
Ans: Shadows are formed when an opaque object comes in the path of light. They appear on screens like the ground or walls.

Q6: What is the purpose of a pinhole camera?
Ans: A pinhole camera is used to form images. It consists of a light-proof box, a screen, and a small aperture through which light enters.

Q7: Define reflection of light.
Ans: Reflection is when light bounces back from a surface. Shiny or polished surfaces, like mirrors, exhibit reflection.

Q8: What is the difference between a real image and a virtual image?
Ans: A real image is formed by the actual convergence of light rays and can be obtained on a screen. A virtual image is the apparent convergence of diverging light rays and cannot be obtained on a screen.

Q9: Explain the characteristics of a plane mirror.
Ans: A plane mirror changes the direction of light, enabling us to see images. It reflects light in straight lines.

Q10: Give an example of an opaque object.
Ans: A table or a book is an example of an opaque object because it does not allow any light to pass through.