P14 Light

Question 1

normal

Answer 1

line perpendicular to mirror

Question 2

angle of incidence, angle of reflection

Answer 2

angle between incident,reflected ray and the normal
law of reflection states they are equal

Question 3

forming an image with a plane mirror

Answer 3

virtual, upright and laterally inverted image

Question 4

real vs virtual images

Answer 4

A real image is formed where light rays actually converge after reflection or refraction, and it can be projected onto a screen.

A virtual image is formed when light rays appear to diverge from a point but don’t actually converge, and it cannot be projected onto a screen.

Question 5

specular vs diffuse reflection

Answer 5

Question 6

RP Refraction

Answer 6

compare angle of refraction with angle of incidence at the point the light ray enters the glass

Question 7

refraction rules

Answer 7

Question 8

red colour filter

Answer 8

transmits only red wavelengths, and absorbs all other wavelengths of the visible light spectrum

Question 9

colour combinations

Answer 9

red + blue = magenta
red + green = yellow
blue + green = cyan
red + blue + green = white

Question 10

red coloured surfaces

Answer 10

reflect only red wavelengths, and absorbs all other wavelengths of the visible light spectrum

Question 11

transparent objects

Answer 11

Question 12

translucent objects

Answer 12

Question 13

why does refraction happen when moving from air to glass

Answer 13

different parts of the wavefront
enter the glass at different times
the velocity / speed (of light) is
less in glass
(so) one part of the wave front
changes speed before other
parts