A boy whise eyes are 150cm above the ground looks at his reflection in a vertical mirror 200cm away. The top and bottom of the mirror are 220cm and 120cm above the ground respectively what length below eyes can he see of himself in the mirror
Answers
Answered by
11
Consider the following diagram in the attachment,
The girl stands about the 30 cm above the bottom level of the mirror .She subtends angle X when she looks at the bottom , beyond this she can not see the mirror .
She will see her image 250 cm behind the mirror .
The triangles formed by the real rays and those extended virtually and 250 cm line in front and behind the mirror all are congruent .
Thus she can see 30 cm below the mirror or 60 cm below her eye level .
Regards
The girl stands about the 30 cm above the bottom level of the mirror .She subtends angle X when she looks at the bottom , beyond this she can not see the mirror .
She will see her image 250 cm behind the mirror .
The triangles formed by the real rays and those extended virtually and 250 cm line in front and behind the mirror all are congruent .
Thus she can see 30 cm below the mirror or 60 cm below her eye level .
Regards
Attachments:
Answered by
2
Answer: 60cm
Explanation:
Similar questions