Tiêu đề Mabrouk question bank 2025.pdf ✅

NEW QUESTION BANK BY/AHMED MABROUK 01224755717 7- A light ray is incident perpendicular to one face of a 90° prism and is totally internally reflected at the glass-air interface. If the angle of reflection is 45°, we conclude that the refractive index, n: ( a ) n < 1 / √2 ( b ) n > √2 ( c ) n > 1 / √2 ( d ) n < √2 8) The index of refraction for water is about 4/3. What happens to light when it travels from air into water? (a) Its speed increases to 4c/3, and its frequency decreases. (b) Its speed decreases to 3c/4, and its wavelength decreases by a factor of 3/4. (c) Its speed decreases to 3c/4, and its wavelength increases by a factor of 4/3. (d) Its speed and frequency remain the same. (e) Its speed decreases to 3c/4, and its frequency increases. 9- Two plane mirrors are at an angle of θ1 = 50.0° with each other as in the side view shown in Figure .If a horizontal ray is incident on mirror 1parallel to mirror2, so the angle θ2 equals a) 500 b) 100 c) 800 d)400 10) A rectangular glass slab ABCD of refractive index n1 is immersed in water of refractive index n2 ( n1> n2) a ray of light is incident at the surface AB as shown . the maximum value of the angle incidence αmax such that the ray comes out only from other surface CD, is given by 11- Virtual images can be formed by : A) only mirrors, only lenses. B) only plane mirrors. C) only curved mirrors or lenses. D) plane and curved mirrors, and lenses.