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9 Physics





10 Physics

20. When a ray of light is incident on the surface of a glass slab, both reflection and refraction of light take palce. If the angle of incidence of the ray is 30° and the refractive index of glass is 1.5, find the angle between the reflected ray and refracted ray.

အလင္းတန္းတစ္ခုသည္ ဖန္တံုးတစ္ခု၏မ်က္ႏွာျပင္ေပၚထိ ႐ိုက္ေသာအခါ အလင္းျပန္ျခင္းႏွင့္အလင္းယိုင္ျခင္းႏွစ္ခုစလံုး ျဖစ္ ေပၚသည္။ အလင္းတန္း၏႐ိုက္ေထာင့္သည္ ၃၀° ျဖစ္ၿပီး ဖန္၏ယိုင္ ၫႊန္ကိန္းသည္ ၁.၅ ျဖစ္လွ်င္ ျပန္လင္းတန္းႏွင့္ ယိုင္လင္းတန္း ၾကား ရွိေထာင့္ကိုရွာပါ။




9 Chemistry






 

10 Chemistry







 
 
 
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