Explain how many femtometers are in a nanometer?

521

---

Explain what is free fall acceleration?

537

---

Explain what is relation between magnetic and electricity and why?

482

---

Explain what is optical medium?

513

---

Explain the working of basic rubber ink filler

515

---

Explain what is the rectilinear propagation of light?

471

---

Explain what is photometry?

508

---

Tell me when taken to the top of a mountain, a clock will go fast or go slow or no change or stop?

456

---

Explain what is h1n1?

509

---

Explain what is the shadows?

523

---

Explain what is the heterogenous?

502

---

Tell me how we are getting light from electrical bulb?

472

---

Draw a graph between frequency of photon and velocity of photo electron?

495

---

What are the ten satellite launched from india and year of launch?

521

---

explain the proper definition of light?

541

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