Question 1:
Which type of lens is thicker at the center than at the edges?
Explanation: The correct answer is A) Convex lens. A convex lens is thicker at the center and thinner at the edges. It is also known as a converging lens because it brings parallel light rays to a focus.
Question 2:
Which type of lens is thinner at the center than at the edges?
Explanation: The correct answer is B) Concave lens. A concave lens is thinner at the center and thicker at the edges. It is also known as a diverging lens because it spreads out parallel light rays.
Question 3:
Which type of lens can form virtual and diminished images?
Explanation: The correct answer is B) Concave lens. A concave lens can form virtual and diminished images. When the object is located within the focal length of a concave lens, the light rays diverge after passing through the lens, forming a virtual image that is smaller and located on the same side as the object.
Question 4:
Which type of lens can form real and inverted images?
Explanation: The correct answer is A) Convex lens. A convex lens can form real and inverted images. When the object is located beyond the focal length of a convex lens, the light rays converge after passing through the lens, forming a real image that is inverted and located on the opposite side of the lens.
Question 5:
Which lens property determines its ability to bend light?
Explanation: The correct answer is D) Refractive index. The refractive index of a lens determines its ability to bend light. It is a measure of how much the lens material slows down light compared to its speed in a vacuum. Lenses with higher refractive indices bend light more.