crossword
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
1.
si unit of power of lens is ............
3.
power of lens is freciprocal of its .................... length
4.
focal length of a spherical mirror is equal to half of its radius of ...................
Down:
1.
speed of light is ..................... in different medium.
2.
A light ray travelling obliquely from a denser medium to a rarer medium bends away from the ...............
OK