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### Which portion of the electromagnetic spectrum is used in a microscope?

visible light

0.10 m

### What is the wavelength of an infrared wave with frequency 4.2 x 10^14 Hz?

7.1 x 10^-7 m

### What is the frequency of infrared light of 1.0 x 10^-4 m wavelength

3.0 x 10^12 Hz

### In a vacuum, electromagnetic radiation of short wavelengths

travels as fast as radiation of long wavelengths.

### When red light is compared with violet light,

both travel at the same speed.

### If you know the wavelength of any form of electromagnetic radiation, you can determine its frequency because

all wavelengths travel at the same speed.

### The relationship between frequency, wavelength, and speed holds for light waves because

all forms of electromagnetic radiation travel at different speeds.

### The farther light is from a source,

the more spread out light becomes.

### If you are reading a book and you move twice as far away from the light source, how does the brightness at the new distance compare with that at the old distance? It is

one-fourth as bright.

### Snow reflects almost all of the light incident upon it. However, a single beam of light is not reflected in the form of parallel rays. This is an example of ____ reflection off a ____ surface.

diffuse, rough

### A highly polished finish on a new car provides a ____ surface for ____ reflection.

smooth, specular

### When incoming rays of light strike a flat mirror at an angle close to the surface of the mirror, the reflected rays are

close to the mirror's surface.

### If a light ray strikes a flat mirror at an angle of 30° from the normal, the ray will be reflected at an angle of

60° from the mirror's surface.

### The image of an object in a flat mirror is always

the same size as the object.

6.0 m

### What type of mirror is used whenever a magnified image of an object is needed?

convex mirror

### The mirror equation and ray diagrams are valid concepts only for what type of rays?

paraxial rays

### Object distance, image distance, and radius of curvature are ____ for curved mirrors.

interdependent

one-half

15 cm

7.14 cm

14 cm

-12 cm

-24.0 cm

### Which best describes the image of a concave mirror when the object's distance from the mirror is less than the focal-point distance?

virtual, upright, and magnification greater than one

### Which of the following best describes the image produced by a flat mirror?

virtual, upright, and magnification equal to one

yellow.

yellow

blue

### As the angle between the electric-field waves and the transmission axis increases,

the component of light that passes through the polarizer decreases and the brightness of light decreases.

### When a straight line is drawn perpendicular to a flat mirror at the point where an incoming ray strikes the mirror's surface, the angles of incidence and reflection are measured from the normal and

the angles of incidence and reflection are equal.

### If a light ray strikes a flat mirror at an angle of 14° from the normal, the reflected ray will be

14° from the normal.

### When two parallel mirrors are placed so that their reflective sides face each other, ____ images form. This is because the image in one mirror becomes the ____ for the other mirror.

multiple, object

### When the reflection of an object is seen in a flat mirror, the distance from the mirror to the image depends on

the distance from the object to the mirror.

### If you looked at a light through the lenses from two polarizing sunglasses that were overlapped at right angles to each other

none of the light would pass through.

Example: