JAMB Physics 2025 Objective — Question 32
Question 32 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2025 Objective paper, with the correct answer and a full explanation.
Advertisement
The energy of a photon with wavelength 50 cm is about: (h=6.63×10⁻³⁴ Js, c=3×10⁸ ms⁻¹)
- A. 3.98×10⁻²⁵ JCorrect
- B. 2.49×10⁻¹⁹ J
- C. 6.63×10⁻²⁶ J
- D. 1.99×10⁻²⁵ J
Explanation
E=hc/λ=(6.63×10⁻³⁴×3×10⁸)/0.5=3.978×10⁻²⁵ J≈3.98×10⁻²⁵ J.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.