| A | B |
|---|
| This lens is thick in the middle and thin at the edges. | convex |
| One of the most common types of lasers is a He-Ne laser. What are the elements in this laser? | helium and neon |
| The upright image you see in a plane mirror is a ___ image. | virtual |
| Glare is reduced by sunglasses that have ___ lenses. | polarized |
| A mixture of light waves of different frequencies which spread out is called ___ light. | incoherent |
| Optical fibers are used extensively in ___. | communications |
| Light is refracted when light changes ___ traveling from one optical medium to another. | velocity |
| A reflective surface that curves inward is a ___ mirror. | concave |
| Lenses form images by ___ light. | refracting |
| Mirrors form images by ___ light. | reflecting |
| This image, ->(), most closely represents a ___. | convex lens |
| This image, ->)(, most closely represents a ___. | concave lens |
| This image, ->(, most closely represents a ___. | convex mirror |
| This image, ->), most closely represents a ___. | concave mirror |
| This image, ->|, most closely represents a ___. | plane mirror |
| Transverse light waves traveling in one plane are ___. | polarized |
| This device emits a beam of coherent light. | laser |
| The bowl of a shiny spoon is most like a ___ mirror. | concave |
| This image is right-side up when you see it in a mirror. | virtual |
| This image is up-side down and can be focused on a screen. | real |
| This lens is thinner at the middle than at the edges. | concave |
| Another name for the focus is the ___. (2 words) | focal point |
| CD players use this to read the music on the CD. | laser |
| A laser would be used to sight straight lines in this profession. | surveying or engineering |
| For a lens to work, it must be (pick one) - transparent, translucent, or opaque | transparent |
| For a mirror to work, it must be (pick one) - transparent, translucent, or opaque | opaque |
| Radiation that can cause chemical changes in matter when it passes through it is called ___ radiation. | ionizing |
| Wilhelm Roentgen discovered these rays in 1895. | X-rays |
| Naturally occuring radiation coming from rocks was discovered by ___. | Henri Becquerel |
| The natural release of charged particles and rays emitted from the unstable nucleus of a radioactive atom is ___. | radioactivity |
| Ionizing radiation originates in which part of the atom? | nucleus |
| What famous scientist was the first person to receive two Nobel Prizes? | Marie Curie |
| What kind of radiation does a cathode ray tube produce? | X-rays |
| Which form of ionizing radiation is not a particle? | gamma |
| Which form of ionizing radiation is a high speed electron? | beta |
| This form of ionization is a helium nucleus. | alpha |
| Which form of ionizing radiation has the greatest penetrating ability? | gamma |
| Which form of ionizing radiation can be stopped by a sheet of paper? | alpha |
| What was used to first detect the presence of X-rays and natural radiation? | photographic plate |
| What device first produced X-rays? | cathode ray tube |
