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Name: Class: Chapter 7Exercise 1Learning Area: Light, Colour and SightLearning Obecti!e: S"nthesising the #ormation o# images b" plane mirrors and lenses$

1$ %iagram 1$1 sho&s a student loo'ing at a plane mirror$

%iagram 1$1

(a) *n the box belo&, dra& the image seen b" the student$

(b) State the characteristics o# image #ormed b" the plane mirror:

(i) $ (ii) $

(iii) $ (i!)

(!)

(c) %iagram 1$+ sho&s a student standing m #rom a plane mirror in a room$ -he student cansee the image o# the &all cloc' located + m behind him$

7-1

Score: /19 x 100 = %

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%iagram 1$+

%iagram 1$ sho&s the top !ie& o# the student in the room$

%iagram 1$

(i) %istance bet&een the student and the image o# the &all cloc': $$ m

(ii) -he time sho&n b" the &all cloc' is . a$m$ Complete the image o# the &all cloc' in the plane mirror as seen b" the student$

+$ %iagram +$1 sho&s an obect placed in #ront o# a con!ex lens$

7-2

Image of the wall clock

1 cm

1 cm

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%iagram +$1

(a) Complete the diagram abo!e to sho& the #ormation o# the image$

(b) -he si/e o# the image: cm (c) -he characteristics o# the image #ormed:

(i) $ (ii) $ (iii) $

$ %iagram sho&s an obect placed in #ront o# a lens$

%iagram

(a) Complete %iagram , to sho& the #ormation o# the image$

(b) -ic' ( 0 ) the obects &hich #orm an image &ith the same characteristics as the image #ormed in%iagram $

7-3

object2F F 2FF

object2F F 2FF

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Name: Class: Chapter 7

7-4

Score: /17 x 100 = %

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Exercise +Learning Area: Light, Colour and SightLearning Obecti!e: S"nthesising the #ormation o# image b" optical instruments$

1$ %iagram 1$1 sho&s an obect in #ront o# a pin2hole camera$

(a) %ra& a ra" diagram to sho& the #ormation o# image$

(b) -he characteristics o# the image #ormed:

(i) $$ (ii) (iii) $$

(c) %iagram 1$+ sho&s the pin2hole camera &ith three pin2holes$

%ra& the images #ormed on the screen$

(d) 3ar' (0) the obects &hich #orm an image &ith the same characteristics as the image #ormed in%iagram 1$1$

7-5

45 cm

Obect

6in2holeScreen

%iagram 1$1

45 cm

Obect

Screen

%iagram 1$+

Screen

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+$ %iagram + sho&s a periscope being used #or !ie&ing things &hich are bloc'ed b" an obstacle$

On %iagram + (a) 8ill in the boxes &ith suitable ans&er$ (b) Complete the light ra"s #rom the obect to the obser!er

$ %iagram sho&s the structure o# a camera$

%iagram (a) Label the parts o# a camera gi!en belo& in %iagram $

%iaphragm 8ilm Aperture

7-6

obser!er

: ..%istant obect

Angle:..

&all

%iagram +

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(b) State the #unction o# the #ollo&ing parts:

Parts Function

Aperture

%iaphragm

8ilm

Lens

Name: Class: Chapter 7Exercise Learning Area: Light, Colour and Sight

7-7

Score: /26 x 100 = %

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Learning Obecti!e: Anal"sing light dispersion$

1$ %iagram 1 sho&s the arrangement o# apparatus to stud" the #ormation o# a spectrum$

(a) 9hat happens to the &hite light at 9

(b) 8ill in the boxes belo& to sho& the arrangement o# the colours #ormed in the spectrum #rom to ;$

+$ %iagram +$1 and %iagram +$+ sho& the #ormation o# rainbo&:

(a) Name the t"pe o# rainbo& in %iagram +$1$

$$

(b) 9hat colour produced at A and

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(i) Name the t"pe o# rainbo& in %iagram +$+$

$$

(ii) 9hat colour produced at A and

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Learning Obecti!e: Anal"sing the addition and substraction o# coloured lights$

1$ %iagram 1 sho&s three coloured lights being shone on a &hite screen$

%iagram 1

List the colours produced:

#rea on the screen P $ R S

o&oure' &i(ht

+$ State the colours #ormed on the screen &hen &hite light passes through #ilters 3 and N$

Fi&ter ) Fi&ter * o&our forme' on the screen

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Stud" the in#ormation in the %iagram and construct a concept regarding the actions o# primar"colour #ilters on &hite light$ ;our explanations should be based on the #ollo&ing

(a) *denti#" t&o in#ormation$

(i) $$

(ii) $

(b) *denti#" t&o common #eatures$

(i) $$

(ii) $

(c) =elate the common #eatures &ith the actions o# the primar" coloured #ilters in order to constructan initial concept$

(d) State one example o# the actions o# the primar" coloured #ilters and one non2example$

Example: $$

Non2example:$$

(e) State the actual concept o# the actions o# the primar" coloured #ilters$

$$

Name: $$ Class: Chapter 7Exercise 4Learning Area: Light, Colour and SightLearning Obecti!e: Anal"sing the e##ect o# mixing pigments$

7-11

Score: /21 x 100 = %

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1$ 8ill in the blan's &ith suitable ans&er #rom the list belo&$

(i) 6igments are #ine solid $$$$$$$$$$$$$$$$$$$$$ that produce their colours b" some colours and

$$ others$

(ii) 6igments can be obtained #rom and $ *t is also arti#iciall" obtained

#rom organic $$

(iii) -he mixing o# pigments is a process o# the $$ o# colours$

(i!) -he primar" colours used in mixing pigments are $, blue and $$$

+$ %iagram 1 sho&s the mixing o# pigments$Label the colour produce$

$ Compare the mixing o# pigments &ith the addition o# coloured light$

7-12

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Simi&arit+

,ifferences

6rimar" colours used

6rocess

=esulting colour

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