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AaronAndyson
 one year ago
An object is 25 cm away from a convex len.The height of the image is twice the height of the object.Find it's focal length.
AaronAndyson
 one year ago
An object is 25 cm away from a convex len.The height of the image is twice the height of the object.Find it's focal length.

This Question is Closed

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Ok, I am gonna tell you a Super Formula for lens \(\sf \boxed{M=\frac{V}{U}=\frac{f}{f+u}=\frac{fv}{f}=\frac{h_i}{h_o}}\)

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1M= magnification, V=image distance u=object distance f=focal length \(\sf h_i~and~h_o\) are image and object height respectively.

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Note: You need to follow the cartasian coordinate.

AaronAndyson
 one year ago
Best ResponseYou've already chosen the best response.1Never heard of that :/

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Heard of what? Cartasian cordinate

AaronAndyson
 one year ago
Best ResponseYou've already chosen the best response.1Never heard of this Cartasian cordinate

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Do you know about the sign convension?

AaronAndyson
 one year ago
Best ResponseYou've already chosen the best response.1To be honest,I don't know a thing about Optics...

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Ok, why don't you read this http://www.standrews.ac.uk/~bds2/optics/cartesian.html

AaronAndyson
 one year ago
Best ResponseYou've already chosen the best response.1How do I solve this problem?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Use the formula m = f/f+u

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1M is magnification. Because the height of the image is twice that of object so the magnification will be 2

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1You need to plug in the values with appropriate sign. that's it 2=f/f+ (25)

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Recheck it should be in positive value
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