Question

Answer the following questions:

1. What is the power of a plane mirror?

2. When the angle of incidence is 90°. What is the angle of refraction?

3. What is the value of speed of light in free space?

4. What is the power of sunglasses?

5. What causes the burning of paper when sunlight, passes through a lens, strikes it?

6. For image construction by ray diagram method, how many rays are sufficient?

7. For rear view, what type of mirror is used in vehicles?

8. Which colour of light reflected by an object will make it appear blue?

9. Based on which theory of light do we say light has dual nature?

10. Which lens has real focus?​

Answer 1

Answer:

A convex lens has a real focus because all the light rays actually pass through the focus. -10

10.