1) What is the phenomenon of light bouncing back into the same medium called? a) Reflection   b) Refraction   c) Dispersion   d) Splitting 2) What is the perpendicular drawn at any point on a mirror called? a) Incident ray   b) Reflected ray   c) Normal   d) Image 3) How many images are obtained when plane mirrors are arranged parallel to each other? a) A single image b) Two images c) Infinite number of images d) Zero image 4) If the angle of incidence is 80o, what will be the angle of reflection? a) 80o   b) 100o   c) 160o   d) 20o 5) When the angle between two plane mirrors is 60∘, how many images will be formed by the mirrors? a) 5 b) 6 c) 7 d) 8 6) If the angle of incidence is 50o, then calculate the angle between the incident ray and the reflected ray. a) 50o   b) 100o   c) 130o   d) 80o 7) Which of the following statements is true? a) The angle of incidence is twice the angle of reflection. b) The incident ray, the reflected ray and the normal drawn at the point of incidence lie in the same plane. c) Some virtual images can be caught on the screen. d) Image formed by a plane mirror is real and upright. 8) What happens in lateral inversion? a) The right side of the object will be on the right side of the image. b) The left side of the object will be on the left side of the image. c) The top of the object will be the bottom of the object. d) The right side of the object will be on the left side of the image. 9) In a periscope, two mirrors are arranged at an angle of a) 90o b) 120o c) 45o d) 60o 10) What is the nature of image formed on the retina of human eye of an object? a) Virtual and erect b) Virtual and inverted c) Real and erect d) Real and inverted 11) An object placed 4 m from a plane mirror 'Br is shifted by 0.5 m away from the mirror. What is the distance between the object and its image? a) 4 m   b) 3.5 m   c) 9 m   d) 5 m 12) How is a rainbow formed? a) When raindrops absorb sunlight b) When raindrops reflect sunlight c) When raindrops disperse sunlight d) When raindrops diffract sunlight 13) In which of the following are plane mirrors arranged at an angle to get a number of colored images? a) Periscope   b) Kaleidoscope   c) Telescope   d) Thermoscope 14) Identify the part of the human eye on which different images are formed. a) Iris   b) Pupil   c) Cornea   d) Retina 15) The reflection of light from a smooth surface is called a) diffused reflection b) regular reflection c) dispersion d) spectrum 16) Band of seven colours is called a) VIBGYOR b) dispersion c) spectrum d) reflection 17) Front bulged part of the eyeball is called a) cornea b) iris c) retina d) pupil 18) Visually impaired people can read and write using a) electronic writer b) Braille system c) digital pens d) hearing aids 19) A toy is placed at 10 cm in front of a plane mirror. What is the distance of image from the mirror? a) 20 cm b) 40 cm c) 10 cm d) 30 cm 20) A candle is 30 cm high. What is the height of its image in a plane mirror? a) 10 cm b) 15 cm c) 30 cm d) 45 cm 21) Which of the following works on the concept of multiple reflections? a) Telescope b) Binoculars c) Kaleidoscope d) Sunglasses 22) The phenomenon of breaking up of white light into its seven constituent colours is called a) reflection of light b) refraction of light c) dispersion of light d) radiation of light 23) How many cells are there in a Braille character? a) 12 b) 9 c) 3 d) 6 24) Both incident ray and reflected ray lie in the same plane. a) True b) False 25) Rods are sensitive to bright light. a) True b) False

Class 8 - Light

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