Question
What is the wavelength of visible
spectrum?Solution
The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengthsfromabout390to750nm interms of angstrom it is in between 3900 - 7600 A°.
Ayush's current age is 25% greater than Ayushi's, and the difference between their ages is 8 years. What will be the ratio of their ages 8 years from now?
- The age ratio of Kiran and Meena 3 years ago was 3:4. In 9 years from now, the ratio of their ages will be 5:6. What is the present age of Meena?
A’s present age is double B’s present age. After 6 years, A’s age will be four times the present age of C. The ratio of B’s age 3 years ago to C...
The ratio of A's age to B's age after 18 years will be 5:6. Seven years ago, the ratio of their ages was 5:7. Find the present average age of A and B.
The ratio of the ages of A, B and C, 5 years ago, was 4 : 5 : 7. The sum of their present ages is 135 years. What will be the sum of the ages (in years...
Seema’s present age is 1(1/2) times of her marriage. She married 12 years ago. Now she has a daughter whose age is 2 more than one third of her ag...
Present age of a Father is three times more than the age of his son. If six years ago, their ages were in ratio 7:1, respectively, then find the present...
The current age of 'P' is 40% more than the current age of 'Q'. Seven years from now, the ratio of their ages will be 14:11. What...
Present ages of ‘A’, ‘B’ and ‘C’ are in the ratio 12:13:16, respectively. If present average age of ‘A’ and ‘C’ is 28 years, then fi...
- Five years ago, the ratio of age of 'A' to 'B' was 4:5. After ten years, the ratio of age of 'A' to 'B' will be 7:8. Find the current age of 'C' who is 6 y...
Relevant for Exams:
