Answer the following questions in one word or a single sentence.
1. Define reflection.
2. State the second law of reflection.
3. Write all the characteristics of the image formed by a plane mirror.
4. Define angle of incidence.
5. Name two instruments that work on multiple reflections.
6. How many colours constitute white light? Name all the colours.
7. State two ways in which you can take care of your eyes.
8. If a coil is placed between two parallel mirrors at 30 cm separation, then how many images
of the coin will be formed?
Answers
Answer:
1। bouncing back of light into same medium is called reflection
2 The second law of reflection states that the angle of reflection is equal to the angle of incidence.
3 Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object.
4 the angle that a line (such as a ray of light) falling on a surface or interface makes with the normal drawn at the point of incidence.
5 kaleidoscope and periscope are the instrument that work on multiple reflection
6 white light consist of 7 colours.The colors of are red, orange, yellow, green, blue, indigo, and violet.
7 Eat a healthy, balanced diet and
Get regular exercise.
8 infinite images will be formed