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  • Which portion of the electromagnetic spectrum is used in a television?

    radio waves

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

    visible light

    What is the wavelength of microwaves of 3.0 x 10^9 Hz frequency?

    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.

    If you stand 3.0 m in front of a flat mirror, how far away from you would your image be in the mirror?

    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.


    For a spherical mirror, the focal length is equal to ____ the radius of curvature of the mirror.


    A concave mirror with a focal length of 10.0 cm creates a real imagine 30.0 cm away on its principal axis. How far from the mirror is the corresponding object?

    15 cm

    A concave mirror forms a real image at 25,0 cm from the mirror surface along the principal axis. If the corresponding object is at a 10.0 cm distance, what is the mirror's focal length?

    7.14 cm

    an object is 29 cm away from a concave mirror's surface along the principal axis. If the mirror's focal length is 9.50 cm, how far away is the corresponding image?

    14 cm

    A convex mirror with a focal length of -20.0 cm has an object 30.0 cm in front of the mirror. what is the value of q or the corresponding image?

    -12 cm

    A mirror has an object located on its principal axis 40.0 cm from the mirror's surface. A virtual image is formed 15.0 m behind the mirror. What is the mirror's focal length?

    -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

    When red light and green light shine on the same place on a piece of white paper, the spot appears to be


    Which of the following is not an additive primary color?


    Which of the following is not an a primary subtractive color?


    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.

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