a. Fill in the blanks in the following paragraph to identify the properties of mirrors and lenses.
Answer :
Lenses produce images through Refraction, but mirrors produce images through Reflection.
A Concave mirror and a convex lens focus light at a point. A convex mirror and a concave lens spread light apart.
b. Compare the signs of ƒ for lenses and mirrors.
Answer :
ƒ represents the focal length in lenses and mirrors.
For Concave lens and mirror - Value of f is always negative .
For convex lens and mirror - Value of f is always positive .
c. What kind of image is formed when the image distance is positive?
Answer: If the image distance is positive - The image will be formed real and inverted.
What kind of image is formed when the image distance is negative?
Answer: If the image distance is negative - The image will be formed virtual and erect .
