Exam 7: The Chemical Elements

The speed of light in a particular transparent medium is 5/8 the speed of light in a vacuum. What is the index of refraction of the material?

A(n) ______________ image is defined as one that can be brought to a focus on a screen.

Complete destructive interference occurs for two waves of the same amplitude and frequency when the waves are ______________ degrees out of phase.

For normal vision, an object can be seen clearly when it is beyond the _____________.

A lens that is thicker at the center than at the edge is

A flashlight beam is seen because of

A simple magnifying glass has a focal length of 6.0 cm. An object is placed 4.0 cm from it. Sketch a ray diagram and give the characteristics of the image.

The waveform of interfering waves is described by the principle of ______________.

A ray of light in water strikes an air-water interface at an angle of incidence greater than the critical angle. The ray

The image formed by a diverging spherical lens is always

If a ray of light passes from air into glass, the angle of incidence will be

The angle of incidence of a light wave is

The greatest diffraction occurs for

A lens that is thicker at the center than at the edge is called a(n) ______________ lens.

The bending of light because of a speed change as it moves from one medium to another is called

A change in the direction of a wave as a result of its encountering a sharp edge or a slit is called ______________.

An object is placed 10 cm to the left of a converging spherical lens. The lens has a focal length of f = 25 cm. What kind of image is formed and what is its orientation?

Liquid crystal displays (LCDs) make use of the wave phenomenon called ______________.

If a ray of light passes from air into glass, the light will

The photoreceptors responsible for color vision are called