Optics and Waves Revision Leaving Cert Physics

The concave spherical mirror of radius r shown above has focal point F and center of curvature C. An object is placed at a distance 2r from the mirror. Where will the image be formed?

• Between C and the object

• Between F and the mirror

• Between F and C

• To the left of the mirror

A group of students collected data using a lens. They varied the distance s_o of an object from the lens and measured the image distance s_i. The figure above is their graph of the inverse of the image distance as a function of the inverse of the object distance. The focal length of the lens is approximately

• 2m

• 1m

• 4m

• 1.5m

If light has a speed v in water, what would be its speed in diamond?

• 3x10^8

• 1.24x10^8

• 6x10^8

• 7.26x10^8

Define reflection

What are the laws of refraction of light

What type of lens do humans have in their eyes? 

• convex

• concave

• converging

• diverging

How many waves are in this picture?

• 1

• 1.5

• 2

• 4

Define Diffraction

What are the primary colours of light

• red

• yellow

• blue

• green

• cyan

a diffraction grating has 600 lines per mm. What is the diffraction grating constant

• 1.6x10^-6

• 1.6x10^-3

• 1.667