If the radius of curvature of the concave reflector of a solar cooker is 100 cm, then what can be the distance (f) for maximum heating of the cooking vessel?

200 cm

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100 cm

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50 cm

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25 cm

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Solution

The correct option is C 50 cm
The cooking vessel should be placed at the point where all the light rays converge.
Therefore, it should be placed at the focus (F) of the concave mirror, where the light rays converge.
Focal length, f = R/2
⇒ f = 50 cm

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If the radius of curvature of the concave reflector of a solar cooker is 100 cm, then what can be the distance (f) for maximum heating of the cooking vessel?

The correct option is C 50 cmThe cooking vessel should be placed at the point where all the light rays converge. Therefore, it should be placed at the focus (F) of the concave mirror, where the light rays converge. Focal length, f = R/2 ⇒ f = 50 cm

The correct option is C 50 cm
The cooking vessel should be placed at the point where all the light rays converge.
Therefore, it should be placed at the focus (F) of the concave mirror, where the light rays converge.
Focal length, f = R/2
⇒ f = 50 cm