Question 1:
Which of the following is an application of reflection of light?
Explanation: The correct answer is A) Periscope. A periscope is an optical device that uses multiple reflections to allow a person to see objects that are not in their direct line of sight, such as in submarines or around obstacles. It uses mirrors to reflect light and redirect the view to the observer.
Question 2:
Which of the following is an application of refraction of light?
Explanation: The correct answer is A) Lenses. Lenses are transparent objects made of glass or plastic that use refraction to converge or diverge light rays. They are used in various optical devices such as cameras, eyeglasses, microscopes, and telescopes.
Question 3:
Which of the following is an application of total internal reflection?
Explanation: The correct answer is A) Fiber optics. Fiber optics use total internal reflection to transmit light signals over long distances. Light is trapped and reflected within a glass or plastic fiber, allowing for efficient and high-speed communication in telecommunication networks.
Question 4:
Which of the following is an application of both reflection and refraction?
Explanation: The correct answer is B) Solar panels. Solar panels use both reflection and refraction to convert sunlight into electricity. The surface of the solar panel reflects some light while allowing the rest to pass through. The internal layers of the panel then refract the light to generate electrical current.
Question 5:
Which of the following is an application of refraction of light in everyday life?
Explanation: The correct answer is A) Eyeglasses. Eyeglasses use refraction to correct vision problems. The lenses in eyeglasses refract light in a way that compensates for the individual's specific vision needs, helping to focus light properly onto the retina.