haym1MoAttevacsp haym1MoAttevacsp

03-07-2016
Physics

contestada

an object is 25 cm away from a convex len.the height of the image is twice the height of the object.find it's focal length.

Respuesta :

olemakpadu olemakpadu

07-07-2016

Object distance = 25cm, u = 25cm

Image = 2 = v/u; v = 2*u = 2*25 = 50cm

By mirror formula:

1/u + 1/v = 1/f

1/25 + 1/50 = 1/f

1/f = 1/25 + 50

1/f = (2 + 1)/50

1/f = 3/50

f = 50/3

f ≈ 16.667 cm

Answer Link

Otras preguntas

What can occur if a person does not take in enough water to replace what is lost? a. dehydration c. nervous system problems b. circulatory problems d. all of th

Cities and civilizations are recent inventions. True or False

The stems in a stem and leaf plot are the ones digits true or false

The Doppler effect suggests that sound waves are relative to the observer. You know if an object is coming or going from the sound it makes. Light waves follo

Which answer choice shows the events in the correct chronological order? a. atomic bomb tested; war in Europe ends; atomic bomb dropped on Hiroshima b. atomic

Why did the French invade the German industrial region of the Ruhr in 1923

How do the circulatory system and the respiratory system work together?

Which of the following is a good example of behavior modification for changing snacking behavior? A. When I want a snack, I'll take a 20-minute walk, then reeva

Which of the following did NOT help cause World War I? Economic competition Balkan nationalism German aggression Communist demonstrations

A liter is the same as a cubic meter. a. True b. False