1. A _______ beam is one whose rays remain the same distance apart.   divergent   convergent   parallel   Hint Half-n-half Clue   2. Materials through which objects can be seen clearly are said to be   translucent   transparent   opaque   Half-n-half Clue   3. The solar eclipse occurs more frequently than the lunar eclipse.   True   False   4. A _______ eclipse occurs when the moon comes between the sun and the earth.   solar   lunar   5. Materials through which light cannot pass are said to be   opaque   translucent   transparent   Half-n-half Clue   6. _______ is a type of solar eclipse where the moon's shadow covers the sun's center and has a ring of sunlight around it.   A helical eclipse   An annular eclipse   A lunar eclipse   Half-n-half Clue   7. The SI unit of luminous intensity is _______.   Calorie   Candela   Coulomb   Half-n-half Clue