A 10 mm long alpine is …

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

Posted by Ʌɐpɐʎ Ɐuɐɥsɹɐp . 7 years, 10 months ago

CBSE > Class 10 > Science

18 answers

Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Ok bye....??

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Given:ho=1cm ,hi= -1/2 cm and v= -30 cm Since,m= hi/ho=-v/u === -5/10=+30/u U=-60cm Now by using mirror formula, 1/v+1/u=1/f ====1/-30=1/-60==1/f Therefore f=-20 cm

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Oh Darshana I am ..really really sorry....because your answer. ..is..correct it will f=-20 cm .....abhi....maine..iiis que..ko solve kiya hai....so...u...are.....correct. ...my..dear.

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

And...mera...koi...thik..nhi...hai...kyon..ki...sayad..cbse..phir se block. .kar..de??

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Ok bye...meeting u at 3..pm

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Are yar pata nhi...kaun...sa....bokar...book ...phy...ka...study kirti hai....?

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Ʌɐpɐʎ Ɐuɐɥsɹɐp . 7 years, 10 months ago

Mera bhe - 10 cm aa rha hai but answer - 20 cm de rkha hai

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

First tell... My ans...is correct

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Check karo

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Ʌɐpɐʎ Ɐuɐɥsɹɐp . 7 years, 10 months ago

OK bye I have some work to done meet you at 3 pm

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Wrong ??

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Ʌɐpɐʎ Ɐuɐɥsɹɐp . 7 years, 10 months ago

Answer is - 20cm

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Gyi

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

Kahan gain?

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

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Online Only On Brnly Geniusvatsone 7 years, 10 months ago

-10cm

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CBSE > Class 10 > Science