Home › CBSE Class 10 › Science › class10_light_lenses › Who prescribes corrective lenses by stating thei…
Who prescribes corrective lenses by stating their powers?
AOphidians
BObsidians
COctagons
DOpticians
Answer & Solution
Correct answer: D. Opticians
1. The prescription names a power, not a length.
2. The power is quoted in dioptres.
3. Opticians do.
_Source: NCERT Class 10 Science, Ch 10 'Light - Reflection and Refraction'_
Related questions
The power of a concave lens is:The power of a convex lens is:One dioptre is the power of a lens whose focal length is:The SI unit of the power of a lens is the:The power of a lens is represented by which letter?The power of a lens is defined as the reciprocal of its:The centres of the spheres forming a lens are called centres of:How many spherical surfaces does a lens have?