Answer the following questions :
In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answer the following question :
What does the negative power indicate ?

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : What does the positive power indicate ?

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : What defect of eyesight do most of the students suffer from?

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : Give two possible reasons for the above defect in 8 students?

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : Generally Which type of spectacles do most of the students use ?

Answer the following questions: What is negative acceleration called ?

Answer the following questions: Define power.

Answer the following questions : What is meant by catenation power?

Answer the following questions : What is the power of a lens ?

Answer the following questions : What is the unit of power of a lens ? Define it .

Answer the following questions : Define electric power.