Home › UP Board Class 10 › physics › c10lensformula › Per NCERT Class 10 Physics, what is the LENS FOR…
Per NCERT Class 10 Physics, what is the LENS FORMULA?
A1/v − 1/u = 1/f
B1/v + 1/u = 1/f (this is the mirror formula)
Cv + u = f
Dv − u = f
Answer & Solution
Correct answer: A. 1/v − 1/u = 1/f
Per NCERT Eq 9.8, lens formula = 1/v − 1/u = 1/f. Mirror formula has + sign.
Related questions
Per NCERT, a combination of two lenses of power +2.0 D and +0.25 D in contact is equivalenPer NCERT, when several LENSES are placed in CONTACT, what is the NET POWER?Per NCERT, if a lens has POWER = −2.5 D, what is its FOCAL LENGTH — and is it convex or coPer NCERT, if a lens has POWER = +2.0 D, what is its FOCAL LENGTH — and is it convex or coPer NCERT, what is 1 DIOPTRE — the SI unit of lens power?Per NCERT, what is the POWER (P) of a LENS — and what is its SI unit?Per NCERT Example 9.4, for the same convex lens problem (f=+10, u=−15), what is the MAGNIFPer NCERT Example 9.4, a convex lens (f = +10 cm) has an object at u = −15 cm. What is the