Discuss Forum

1. বেগুনী রশ্মির তরঙ্গদৈর্ঘ কত?

  • A. 570-500 nm
  • B. 570-500 nm
  • C. 570-500 nm
  • D. 570-500 nm

Answer: Option D

Explanation:

Post your comments here:

Name:
Mobile:
Email:(Optional)

» Your comments will be displayed only after manual approval.