NEET Physics Optical Instruments MCQ Question
Which of the following statements about optical instruments is correct?
The minimum deviation angle in a prism occurs when the refracted ray is parallel to the base of the prism.
The focal length of a concave lens is always positive regardless of the object position.
In a convex lens, the image is always formed on the opposite side of the lens from the object.
A virtual image can only be formed by a concave mirror or a convex lens.
Correct Answer
Detailed Explanation
The minimum deviation angle, Dm, occurs when the refracted ray inside the prism is parallel to its base, confirming that statement A is correct. This concept is highlighted in the context of prisms and their refractive properties.
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