Question

Give me all answers of this question, urgent need fast

Answer 1

1. a focal length of concave mirror - positive
focal length of convex mirror - negative

2 Spectrum -
a band of colours, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.

3.divergent beam of light means when Light rays from a point source oflight travel in all directions, moving away with time. Such a beam of light is called a divergent beam of light. 

3.Real image can be taken on screen
- is inverted

4.lateral inversion - It means in the mirror if u raise ur left hand u can see ur right hand is raised so.. thats lateral inversion Lateral inversion" means the apparent reversal of the mirror image's left and right when compared with the object.

5. Concave mirror are used for
- seeing magnified image of our face during shaving
- it can also be used in telescopes

Answer 2

hey dear ur answers ❤❤

1): a) The Focal length of a concave mirror is the distance between pole and focus. ( + )
b) The Focal length of a convex mirror is the distance between pole and focus.(-)

2): It is the set of 7 colours in which light can be separated and splitted.

3): Real Image: The Image which is formed Infront of the mirror.

4): Lateral inversion refers When an object is placed in front of a plane mirror then the right side of object appears to become the left side of a image.This changes of sides of an object is called lateral image.

5): 2 uses :

a) these are used by the dentist to see the large images of teeth of patients.
b) these are used as reflectors in torches.

hope it helps ✔✔