Question

SECTION -A 1. A Concave mirror is used as reflector in A. Torches B. Search lights c)Head lights of motor vehicles D. All the above 2. A real and inverted image of the same size is formed by a convex lens when the object is placed alatt B) at 2F C) between F and 2F D) has uniform thickness everywhere 3. A convex lens a) is called a diverging lens b) is thicker at the middle than at the edges c) is thicker at the edges than at the middle d) has uniform thickness everywhere 4. A ray of light travelling in air falis obliquely on the surface of a calm pond. It will algo into the water without deviating from its path b) deviate towards the normal c)deviate away from the normal d) turn back on its original path field of view?​

Answer 1

Answer:

1. A) torches

2. B) at 2F

3. B) Thicker at the middle than the edges

4. a) It will go into the water without deviating from its path

Answer 2

Answer: 1. (D) all of the above.

2. (B) at 2F (twice the length of focus)

3. (B) is thicker on the middle than at the edges

4. (B) deviate towards the normal

Explanation: