sumonasamanta2000 sumonasamanta2000

12-09-2021
Physics

contestada

what will be the focal lenght of a combined lens made by contact of two lenses of power +3D and -2D.

Respuesta :

Аноним Аноним

12-09-2021

P_1=+3D
P_2=-2D

[tex]\\ \bull\tt\dashrightarrow P=P_1+P_2[/tex]

[tex]\\ \bull\tt\dashrightarrow P=+3D-2D=+1D[/tex]

Now

[tex]\\ \bull\tt\dashrightarrow f=\dfrac{1}{P}[/tex]

[tex]\\ \bull\tt\dashrightarrow f=\dfrac{1}{1}[/tex]

[tex]\\ \bull\tt\dashrightarrow f=1m[/tex]

Answer Link

Otras preguntas

Which of the following did not cause the decline of the Byzantine Empire? invasions by Islamic peoples invasions by European tribes lack of freedom for women

Choose one of the factors of x*3 + 343. a. x − 7 b. x*2 − 14x + 49 c. x*2 + 7x + 49 None of the above

The perimeter of a rectangle is 96 ft. The ratio of its length to its width is 7 : 5. What are the dimensions of the rectangle? A. 30 ft by 18 ft B. 28 ft by 20

This week, Sam drove 12 more than 8 times as many miles as he drove the previous week. He drove n miles the previous week. Which expression could you use to fin

The phrase "eight more than a number" can be written as which variable expression? A. 8x B. x-8 C. x+8 D. 8x-8

Evaluate the expression when x = 8 and y = 1. x/2y A. 8 B.1/8 C.4 D.1/4

Which of the Civil War and Reconstruction amendments has had the greatest impact on American history?

What is 23/9 as a mixed number

Evaluate the expression when x = 8 and y = 1. x/2y A. 8 B.1/8 C.4 D.1/4

What is the answer to 3+p=8