school

Science Department

Physics

SPH 4A0

Name:__________________

Mirrors/Refraction Test

REMEMBER: NO MARKS WILL BE GIVEN FOR UNSUPPORTED SOLUTIONS!!!

PART A - Plane Mirrors (10 marks)

5 1) Given an object located in front of a plane mirror, locate the image and show how the eye "sees" it.

2 2) The image in a plane mirror can be characterized by the following equations: h_i/h_o = 1, d_i = -d_o, where the subscripts "i" and "o" refer to the image and the object respectively. Interpret each equation in words.

1 3)a) What is the focal length of a plane mirror?

2 b) Does the mirror equation hold for a plane mirror? Explain.

PART B - Curved Mirrors (22 marks)

1 1) Where must an object be located for rays of light from it to form an image at the principle focus of a concave mirror?

** NOTE: For questions 2) and 3) only, use the mirror and magnification equations.

5 2) What is the radius of a concave mirror that gives a 1.5X magnification of a face 25 cm from it?

6 3) A spherical, polished metallic ball is used as a convex mirror over a birdbath. The diameter of the ball is 30 cm. A hummingbird, 5 cm tall hovering 20 cm away, looks directly at the ball. What are the size and position of the bird's image?

b) Does the bird see itself upright or inverted? _________

7 4) Using a ray diagram, locate the position of the image of a candle 5 cm high placed 10 cm in front of a concave mirror, with a centre of curvature of 30 cm. STATE THE FOUR CHARACTERISTICS OF THE IMAGE.

3 5) Using a ray diagram, locate the position of the object given that the image is located as shown.

PART C - Refraction (25 marks)

8 1) Two transparent liquids are carefully poured, one after another, into a plexiglas container, as shown. The two liquids will not mix with each other. A ray of light, with an angle of incidence in the plexiglas of 17^o, is projected up through the liquids. What will be the angle of refraction in air?

6 2) Light strikes a glass plate at an angle of incidence of 60^o, part of the beam being reflected and part refracted. It is observed that the reflected and refracted portions make an angle of 90^o with each other. What is the index of refraction of the glass?

5 3) A ray of light in air makes an angle of incidence of 45^o at the surface of a sheet of ice. The ray is refracted within the ice at an angle of 30^o. What is the critical angle for the ice?

3 4) Draw a ray diagram to show why a stick looks bent when part of it is under water.

3 5) A ray of light, travelling in air, strikes a piece of sodium chloride with an angle of incidence of 35^o. What is the angle of refraction?

n_NaCl = 1.53

PART D - Bonus Question (5 marks)

5 1) After scoring his first goal as a Toronto Maple Leaf, Shawn is awarded the puck in a large post-game ceremony. In order to get a laugh, his teammates throw the puck into the team whirlpool and tell Shawn that if he wants it he must retrieve it himself. Given the information in the diagram and the fact that Shawn's hockey stick is 2.0 m long, can he reach the puck, using his stick, without getting his hand wet?

W. F. Herman Secondary School

Science Department

Physics

SPH 4A1

Name:__________________

Light and Colour Test

REMEMBER: NO MARKS WILL BE GIVEN FOR UNSUPPORTED SOLUTIONS!!!

PART A - Mirrors (29 marks)

6 1) Given an object located in front of a plane mirror, locate the image and show how the eye "sees" it.

5 2) Identify the numbered parts in the following diagram.

1) ___________________ 2) ___________________

3) ___________________ 4) ___________________

5) ___________________

4 3) The following diagram shows an object and its image. Using the rules for rays in curved mirrors, locate the centre of curvature and the principal focus and label them on the diagram.

7 4) Locate the object in the following diagram, given the image as shown. List the properties of the object once it has been found.

7 5) Locate the image in the following diagram, given the object as shown. List the properties of the image once it has been found.

PART B - Refraction (17 marks)

8 6) Two transparent liquids are carefully poured, one after another, into a plexiglas container, as shown. The two liquids will not mix with each other. A ray of light, with an angle of incidence in the plexiglas of 17^o, is projected up through the liquids. What will be the angle of refraction in air?

3 7) A ray of light, travelling in air, strikes a piece of sodium chloride with an angle of incidence of 35^o. What is the angle of refraction?

6 8) Calculate the critical angle for light rays passing from:

a) lucite into glass (crown)?

b) diamond into air?

PART C - Lenses (24 marks)

7 9) Using a scale ray diagram, locate the position of the image of a candle 15 cm high, placed 15 cm in front of a converging lens of focal length 20 cm. List all of the properties of the image.

7 10) A candle, 10 cm high, is placed 45 cm in front of a diverging lens of focal length 15 cm. By means of a scale ray diagram, locate the image and determine its height. Also list all of the properties of the image.

5 11) An object, 9 cm high, is placed 48 cm in front of a converging lens of focal length 18 cm. Using the lens and magnification equations, determine the image position and height.

5 12) A lamp, 22 cm high, is placed 85 cm in front of a diverging lens of focal length 30 cm. Find the image position and the height of the image.

PART D - Colour (8 marks)

5 13) An American flag is illuminated by a blue light. What colours will its red, blue and white parts appear to be? Explain your answer.

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

3 14) Draw small diagrams to show which colours pass through the following filters (draw in the order that they are listed): (Assume filters are compound)

a) red and green

b) blue and yellow

c) green and yellow

PART E - Bonus Question (5 marks)

5 15) After scoring his first goal as a Windsor Spitfire, Luke was awarded the puck in a large post-game ceremony. In order to get a laugh, his teammates throw the puck into the team whirlpool and tell Luke that if he wants it he must retrieve it himself. Given the information in the diagram and the fact that Luke's hockey stick is 2.0 m long, can he reach the puck, using his stick, without getting his hand wet?

Walkerville Collegiate Institute

Science Department

Physics

SPH 4A0

Name:__________________

Mirrors/Refraction Test

REMEMBER: NO MARKS WILL BE GIVEN FOR UNSUPPORTED SOLUTIONS!!!

PART A - Multiple Choice (10 marks)

1) Which of the following is not a property of light?

(A) It travels faster than sound

(B) It travels faster in air than in a vacuum

(D) It can be bent by refraction

(E) It is a form of energy

2) A translucent material is one that

(A) transmits images poorly

(B) transmits images clearly

(D) does not reflect light rays

(E) absorbs all of the light rays

3) The term virtual, as used to describe an image, means that the image

(A) is located on the surface of the mirror

(B) cannot be photographed by a camera

(D) is the same size as the object

(E) cannot be caught directly by a screen

4) The image produced by a convex mirror is

(A) always real, smaller and upright

(B) always virtual, larger and upright

(D) always virtual, smaller and upright

(E) any one of the above, depending on the separation of the object and mirror

5) Where must an object be placed in front of a concave mirror so that the image formed will have the same height as the object?

(A) at the principle focus

(B) at the centre of curvature

(D) between the principle focus and the centre of curvature

(E) outside the centre of curvature

6) An incident light ray strikes a plane mirror at an angle of 45^o. The angle between the incident and reflected light rays is

(A) 22.5^o (B) 45^o (C) 67.5^o (D) 90^o (E) 135^o

7) The path of a light ray travelling from air to glass is shown below.

The angle of refraction is

(A) AOY (B) BOD (C) AOC (D) BOX (E) COX

8) Total reflection of light occurs at the surface between air and glass when

(A) the light is travelling from air toward glass

(B) the angle of incidence is greater than the critical angle

(D) the angle of incidence is zero

(E) the angle of incidence equals the angle of refraction

9) The critical angle for diamond is 25^o. Total internal reflection occurs when light is incident on

(A) the air to diamond boundary at an angle of incidence of 25^o

(B) the air to diamond boundary at an angle of incidence greater than 25^o

(D) the diamond to air boundary at an angle of incidence less than 25^o

(E) the diamond to air boundary at an angle of incidence greater than 25^o

10) The critical angle for water is 49^o. Light travelling initially in the water strikes the surface at an incidence angle of 30^o. After striking the water-air boundary, the light

(A) is partly reflected and partly refracted

(B) is totally refracted

(D) travels along the boundary

(E) travels along the normal

PART B - Plane Mirrors (9 marks)

5 1) Given an object located in front of a plane mirror, locate the image and show how the eye "sees" it.

2 3) What is the focal length of a plane mirror? Explain.

PART C - Curved Mirrors (11 marks)

1 1) Where must an object be located for rays of light from it to form an image at the principle focus of a concave mirror?

7 2) Using a ray diagram, locate the position of the image of a candle 5 cm high placed 10 cm in front of a concave mirror, with a centre of curvature of 30 cm. STATE THE FOUR CHARACTERISTICS OF THE IMAGE.

3 3) Using a ray diagram, locate the position of the object given that the image is located as shown.

PART D - Refraction (25 marks)

5 3) A ray of light in air makes an angle of incidence of 45^o at the surface of a sheet of ice. The ray is refracted within the ice at an angle of 30^o. What is the critical angle for the ice?

3 4) Draw a ray diagram to show why a stick looks bent when part of it is under water.

3 5) A ray of light, travelling in air, strikes a piece of sodium chloride with an angle of incidence of 35^o. What is the angle of refraction?

n_NaCl = 1.53

PART E - Bonus Question (5 marks)

5 1) After scoring his first goal as a Toronto Maple Leaf, Shane is awarded the puck in a large post-game ceremony. In order to get a laugh, his teammates throw the puck into the team whirlpool and tell Shane that if he wants it he must retrieve it himself. Given the information in the diagram and the fact that Shane's hockey stick is 2.0 m long, can he reach the puck, using his stick, without getting his hand wet?

W. F. Herman Secondary School

Science Department

Physics

SPH 4A1

Name:__________________

Light and Colour Test

REMEMBER: NO MARKS WILL BE GIVEN FOR UNSUPPORTED SOLUTIONS!!!

PART A - Mirrors (29 marks)

6 1) Given an object located in front of a plane mirror, locate the image and show how the eye "sees" it.

5 2) Identify the numbered parts in the following diagram.

1) ___________________ 2) ___________________

3) ___________________ 4) ___________________

5) ___________________

4 3) The following diagram shows an object and its image. Using the rules for rays in curved mirrors, locate the centre of curvature and the principal focus and label them on the diagram.

7 4) Locate the object in the following diagram, given the image as shown. List the properties of the object once it has been found.

7 5) Locate the image in the following diagram, given the object as shown. List the properties of the image once it has been found.

PART B - Refraction (17 marks)

3 7) A ray of light, travelling in air, strikes a piece of sodium chloride with an angle of incidence of 35^o. What is the angle of refraction?

6 8) Calculate the critical angle for light rays passing from:

a) lucite into glass (crown)?

b) diamond into air?

PART C - Lenses (24 marks)

7 9) Using a scale ray diagram, locate the position of the image of a candle 15 cm high, placed 15 cm in front of a converging lens of focal length 20 cm. List all of the properties of the image.

5 11) An object, 9 cm high, is placed 48 cm in front of a converging lens of focal length 18 cm. Using the lens and magnification equations, determine the image position and height.

5 12) A lamp, 22 cm high, is placed 85 cm in front of a diverging lens of focal length 30 cm. Find the image position and the height of the image.

PART D - Colour (8 marks)

5 13) An American flag is illuminated by a blue light. What colours will its red, blue and white parts appear to be? Explain your answer.

3 14) Draw small diagrams to show which colours pass through the following filters (draw in the order that they are listed): (Assume filters are compound)

a) red and green

b) blue and yellow

c) green and yellow

PART E - Bonus Question (5 marks)