Question

tick the correct options.

1. if the radius of curvature (R) of convex mirror is 30cm. what is the focal length?
a. 30 cm
b. 60 cm
c. 15 cm
d. 10 cm

2. what type of mirror is used in the torches use that homes or by the dentist?
a. plane
b. convex
c. concave
d. Plano convex

3. real image can be formed on a screen.
a. true
b. false

4. convex lens are the lengths which are thicker in the middle and thinner at the edges.
a. true
b. false

5. unlike sound, light travels along a straight line.
a. true
b. false

6. a concave mirror always forms a virtual image.
a. true
b. false​

Answer 1

Answer:

1.) c. 15 cm

2.) c. Concave mirror

3.) a. True

4.) a. True

5.) a. True

6.) b. False

Explanation:

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Answer 2

Answer:

1:- (c) 15 cm

2:- (c) concave mirror

3:- (a) true

4:- (a) true

5:- (a) true

6:- (a) true

Explanation:

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