আলোর প্রতিসরণ ও প্রতিফলন
A ray of light passes through a right angled prism as shown in the adjacent diagram. State the angles of incidence at the faces and . Given critical angle is .
OP is incident normally on face AB and strikes AC undeviated. Since (total internal angle of a triangle is ), the angle of incidence will be . Since, critical angle for glass prism is the ray undergoes total internal reflection with an angle of reflection of . It then strikes BC normally and hence angle of incidence at that face is .
When viewed vertically a fish appears to be 4 meter below the surface of the lake. If the index of refraction of water is 1.33, then the true dept of the fish is
The angle of incidence of a ray for which the angle of refraction is is called
একটি আলোক রশ্মি চিত্রে প্রদর্শিত তিনটি মাধ্যম দিয়ে অতিক্রম করছে। বেগগুলোর কোন ক্রমটি সঠিক?
When a ray of light passes through a rectangular glass block, the direction of emergent ray is .......... to the incident ray.