Questions
The focal length of a spherical mirror from the following observations : object distance cm and image distance is
detailed solution
Correct option is B
GivenObject distance u=u±Δu=50.1±0.5 cmImage distance v=v±Δv=20.1±0.2 cmFrom mirror formula1F=1v+1u ⇒1F=150.1+120.1∴F=14.34 cmand ΔFF2=Δvv2+Δuu2⇒ΔF=ΔuFu2+ΔvFv2=0.514.3450.12+0.214.3420.12=0.04+0.10=0.14 cmHence, F=14.3±0.1 cmTalk to our academic expert!
Similar Questions
The density of a cube is measured by measuring its mass and length of its sides. If the maximum errors in the measurement of mass and length are 3% and 2% respectively, then the maximum error in the measurement of density is
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