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2026 HKDSE物理暑期班 — 中大港大名師小班
針對HKDSE Physics考生設計的密集暑期課程，涵蓋Mechanics、Electromagnetism、Waves & Optics及Modern Physics。朗林物理提供中大、港大背景導師，真正小班教學（最多8人），助學生在2026 HKDSE取得5**佳績。
HKDSE Physics 精選題目與詳細題解
1. Mechanics：A 2kg block is projected up a rough incline of 30° with initial speed 8 m/s. Coefficient of friction is 0.2. Find the distance travelled up the incline before stopping. (2025 DSE style)
Solution:
Using energy conservation: initial KE = mgh + work against friction
½mv² = mg(d sinθ) + μmg(d cosθ)
d = (v²) / [2g(sinθ + μcosθ)] = 4.2 m
2. Electromagnetism：A straight conductor carries 5A current. Calculate magnetic field at 4cm perpendicular distance. (Biot-Savart Law)
Solution:
B = μ₀I / (2πr) = (4π×10⁻⁷ × 5) / (2π × 0.04) = 2.5×10⁻⁵ T
3. Waves：A sound wave has frequency 340Hz and wavelength 1m in air. Find speed of sound and time to travel 340m.
Solution:
v = fλ = 340 m/s
Time = distance/speed = 340/340 = 1s
4. Optics：Find critical angle for light travelling from glass (n=1.5) to air.
Solution:
sin c = 1/n = 1/1.5 → c = 41.8°
5. Radioactivity：A sample has half-life 5 years. How long for activity to drop to 12.5%?
Solution:
12.5% = 1/8 = (1/2)³ → 3 half-lives = 15 years
#PhysicsTuition
#中大物理
#港大補習
#DSEPhysics
English Version
Our 2026 HKDSE Physics Summer Program is specially designed for students aiming for 5**. Small-class teaching by CUHK & HKU graduates. Locations: Prince Edward, Lam Tin, Sha Tin, Tsuen Wan. Master Mechanics, Electromagnetism, Waves and Radioactivity with exam-focused practice.
學生成績與評語
陳同學 (2025) — 5**
“Martin Sir 的解題技巧令我由4升到5**，暑期班真的很值得！”
李同學 (2025) — 5*
“Patrick Sir 講解清晰，Electromagnetism 由完全不懂變成滿分。”
朗林物理補習社特點
- 中大港大名師小班教學（最多8人）
- 專注HKDSE Physics 5** 奪分策略
- 4大分校 + Zoom 同步上課
導師介紹
4大地點
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