1) Suppose you pass light through a concave lens and convex lens, both made of g

Question

1) Suppose you pass light through a concave lens and convex lens, both made of glass (n = 1.50) and find that the magnitude of their focal lengths are both f. If the measurement is now done underwater (n = 1.33) instead of in an air atmosphere

concave: more than f, convex: less than f

concave: more than f, convex: exactly f   

concave: less than f, convex: more than f

concave: exactly f, convex: less than f

concave: less than f, convex: less than f

concave: exactly f, convex: more than f

concave: more than f, convex: more than f

concave: exactly f, convex: exactly f

concave: less than f, convex: exactly f

2)

An object is placed just slightly less than f from a concave lens, and now you move the object toward the lens. What happens to the virtual image?

the image grows larger, and remains fixed

the image grows smaller, and moves farther from the lens   

the image remains the same size, and moves closer to the lens

the image grows smaller, and moves closer to the lens

the image remains the same size, and moves farther from the lens

the image grows smaller, and remains fixed

the image grows larger, and moves farther from the lens

the image grows larger, and moves closer to the lens

the image remains the same size, and remains fixed

3) In procedure 2, suppose the convex lens is placed at the 36.1 cm mark, and an image forms on the screen at the 50.5 cm mark. Find:

- the focal length of this lens
- the absolute value of the magnification of this lens  
- the height of the image

thanks!

Explanation / Answer

1) concave: more than f, convex: more than f

2) the image grows smaller, and moves closer to the lens

3) 1/S +1/S' =1/F

1/36.1 + 1/(50.5-36.5) = 1/F

F =10 cm

M = -S'/S = 0..38

hi = ho*M

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.