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3 Cards in this Set
- Front
- Back
- 3rd side (hint)
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A light ray that enters a glass block from the air because... |
The light travel slower in the glass than in the air. |
When a light ray enters an optically denser material, it bends toward the normal because the light slows down in the material. |
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In which year NASA begin to build the Hubble Space Telescope? |
1977 |
The American astronomer Lyman Spitzer first proposed an extraterrestrial observatory in 1946. The Hubble Space Telescope named after Edwin Hubble. |
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People with an A-positive (A+) blood type may safely donate blood to those with which blood type? |
AB positive (AB+) |
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