1. A lunar eclipse occurs when the earth comes between the sun and the moon.   True   False   2. The partly lighted area of a shadow on the periphery of the totally shaded portion is called the _______   umbra   eclipse   penumbra   Hint Half-n-half Clue   3. The SI unit of luminous intensity is _______.   Coulomb   Calorie   Candela   Half-n-half Clue   4. _______ is an instrument used to compare the luminous intensities of two sources of light.   Electroscope   Photometer   Camera   Half-n-half Clue   5. Illuminance of a surface is proportional to the power of the light source and inversely proportional to the square of the _______.   distance   luminous intensity   area   Half-n-half Clue   6. A _______ eclipse occurs when the moon comes between the sun and the earth.   solar   lunar   7. The solar eclipse occurs more frequently than the lunar eclipse.   True   False