Question
Why can an X-ray telescope not be based on the earth?
✓
Answer
- X-rays are emitted from distant heavenly bodies.
- The rays coming towards the earth will be absorbed by the earth’s atmosphere and will go undetected.
- Hence, X-ray telescopes are placed in an orbit outside the earth’s atmosphere and not on the earth.
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Study the activity and answer the following questions.![]()
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(a) Figure A – Why does the cup get pulled?
(b) Figure B – What is the relation between the displacement of the cup and the force applied through the ruler?
(c) In Figure C-Why doesn’t the cup get displaced?
(d) What is the type of work done in figures A, B and C?
(e) In the three actions above, what is the relationship between the applied force and the displacement?
(a) Figure A – Why does the cup get pulled?
(b) Figure B – What is the relation between the displacement of the cup and the force applied through the ruler?
(c) In Figure C-Why doesn’t the cup get displaced?
(d) What is the type of work done in figures A, B and C?
(e) In the three actions above, what is the relationship between the applied force and the displacement?