Civil Services TNPSC Group 1 (New Syllabus) Mock Test 2025 General Science Physics Wave

দৃশ্যমান আলোর তরঙ্গদৈর্ঘ্যের পরিসর কত?

1
0.7 থেকে 0.9 µm
2
1 থেকে 2 µm
3
0.2 থেকে 0.3 µm
4
0.4 থেকে 0.7 µm
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