For converging and diverging lens types:
a. Explain what the “focal length” of a lens is.
b. What is the difference between converging and diverging lenses?
c. What is the relationship between the object distance and the image distance for a lens?
Using the thin lens equation, determine the location and size of
each image of the "4" when it is a the 10cm mark, the 20cm convex
lens(objective) is at the 80cm mark and the 10cm lens(eyepiece) is
placed at the 114cm mark on the track. How many times larger is the
final image when the eyepiece is at the 116cm mark?
1-What is the expression for the thin lens equation? Define all
the terms in the expression.
2-Describe the three properties that determine the focal length
of a lens.
3-Define the following:
i. Converging lens______
ii. Diverging lens_______
iii. Focal length___________
iv. Focalpoint____________
v. Object distance_______
vi. Imagedistance___
vii. Real image___
viii. Virtual image
Draw the electrical circuit diagram of electromagnetic forming,
label it neatly and explain how a thin cylinder can be expanded or
compressed by this process.
Question 1:
Part (A)
Prove the thin lens equation, geometrically.
Also show that the focal length of a curved mirror is 1/2 the
radius of curvature. DRAW good diagrams
Part (B).
White light is incident on a soap film (n = 1.33 and thickness =
800 nm) suspended in air. If the incident light makes a 45o angle
with the normal to the film, what visible wavelengths with be
constructively reflected?