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A 10 mm long awl pin is placed vertically in front of a concav mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

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Similar Questions
Q1

A 10mm long awl pin is placed vertically in front of a concave mirror. A 5mm long image of the awl pin is formed at 30cm in front of the mirror. The focal length of this mirror is?


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Q2
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

(a) -30 cm
(b) -20 cm
(c) -40 cm
(d) -60 cm
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Q3

Question 2
A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

(a) -30 cm
(b) -20 cm
(c) -40 cm
(d) -60 cm

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Q4
An object is placed at a distance of 10cm from the concave mirror and the image is formed 20cm in front of the mirror. The focal length of the mirror is:
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Q5
When an object is placed at a distance of 15 cm from a concave mirror its image is formed at 10 cm in front of the mirror. Calculate the focal length of the mirror.
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