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 : 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. 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 : Generally Which type of spectacles do most of the students use ?

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?

Tanrnayee from Std. X uses spectacles. The power of the lenses in her spectacles is-2.5 D. Answer the following questions: Find the focal length of the lenses used in her spectacles.

Answer the following questions : Aniket from Std. X uses spectacles . The power of the lenses in his spectacles is -0.5 D. Answer the following question : State the type of lenses used in his spectacles.

Tanrnayee from Std. X uses spectacles. The power of the lenses in her spectacles is-2.5 D. Answer the following questions: State the type of lenses used in her spectacles.

Surabhi from std. X uses spectacles. The power of the lenses in her spectacles is 0.5 D. Answer the following questions from the given information: Identify the defect of vision Surabhi is suffering from.

Surabhi from std. X uses spectacles. The power of the lenses in her spectacles is 0.5 D. Answer the following questions from the given information: Identify the type of lenses used in her spectacles.