GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the reflected ray will pass parallel to the principal axis
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the reflected ray will retrace its path after reflection
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the reflected ray will pass through the focus on the principal axis
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the ray will be reflected obliquely
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Detailed explanation-1: -An incident ray traveling parallel to the principal axis will reflect and pass through the focal point. An incident ray traveling through the focal point will reflect and travel parallel to the principal axis.
Detailed explanation-2: -In this condition, we consider two rays parallel to the principal axis originating from the object. These rays after reflection converge and form an image at F, the principal focus of the mirror, in front of the mirror. The image thus formed is highly diminished, point size, real and inverted.
Detailed explanation-3: -Any incident ray traveling parallel to the principal axis on the way to a concave mirror will pass through the focal point upon reflection. Any incident ray passing through the focal point on the way to a concave mirror will travel parallel to the principal axis upon reflection.
Detailed explanation-4: -A light ray directed parallel to the principal axis will reflect off the mirror through the focal point on the same side of the mirror.