Question 1:
Which of the following is an example of a lens aberration?
Explanation: The correct answer is A) Chromatic aberration. Chromatic aberration is an example of a lens aberration. It occurs due to the dispersion of different colors of light, causing them to focus at different points, resulting in color fringing or blurring in an image formed by a lens.
Question 2:
Which type of lens aberration causes distortion at the edges of an image?
Explanation: The correct answer is A) Spherical aberration. Spherical aberration is a type of lens aberration that causes distortion at the edges of an image. It occurs due to the curvature of the lens surface, leading to different focal lengths for rays passing through the central and peripheral portions of the lens.
Question 3:
Which type of lens aberration causes comet-like or star-like distortions around bright objects?
Explanation: The correct answer is B) Coma aberration. Coma aberration is a type of lens aberration that causes comet-like or star-like distortions around bright objects. It occurs due to the nonuniform bending of light rays by the lens, resulting in asymmetrical blurring and distortion.
Question 4:
Which type of lens aberration causes a blurred image due to the inability of the lens to focus all colors at the same point?
Explanation: The correct answer is D) Chromatic aberration. Chromatic aberration causes a blurred image due to the inability of the lens to focus all colors at the same point. It occurs because different wavelengths of light are refracted differently, resulting in color fringes or blurring in an image.
Question 5:
Which of the following is used to correct lens aberrations in optical systems?
Explanation: The correct answer is A) Corrective lenses. Corrective lenses are used to correct lens aberrations in optical systems. These lenses are designed to compensate for the inherent aberrations of the primary lens, allowing for improved image quality and sharper focus.