1. Given that the speed of light is 3×10^8 m/s
In air and 2.25×10^8 m/s in water, construct
The emergent wavefront from a small source
Situated in water 20 cm below the surface
And from this determine the position of the
Image .

2. An object held against a plate glass mirror of
Refractive index 1.54 appears to be 20 mm in
From its image . What is the thickness of the
Mirror ?

4. For a convex refracting optical element in air with a radius of
Curvature of 60 cm and a refractive index of 1.45, calculate:
a. The image location for an object 25 cm to the left of the element.
b. The image location for an object very very far away from the element.

6. Multi Thin Lenses – Draw 2 diagrams of a reflecting telescope of an objective lens with a 50 mm diameter and 20 cm focal length:

a) Galilean eyepiece of 25 mm diameter and -5 cm focal length
b) Keplerian eyepiece of 15 mm diameter and +5 cm focal length.
c) Explain the key difference between these two telescope designs and Calculate the total Focal Length and Magnification of each.
d) Why does the eyepiece lens of the Galilean telescope need to have a larger diameter than that of the Keplerian Telescope?

th and Magnification of each.
d) Why does the eyepiece lens of the Galilean telescope need to have a larger diameter than that of the Keplerian Telescope?

cm below the surface
And from this determine the position of the
Image .

2. An object held against a plate glass mirror of
Refractive index 1.54 appears to be 20 mm in
From its image . What is the thickness of the
Mirror ?

4. For a convex refracting optical element in air with a radius of
Curvature of 60 cm and a refractive index of 1.45, calculate:
a. The image location for an object 25 cm to the left of the element.
b. The image location for an object very very far away from the element.

6. Multi Thin Lenses – Draw 2 diagrams of a reflecting telescope of an objective lens with a 50 mm diameter and…