Important

Question 1

Draw the refraction of light in glass

Answer 1

Question 2

What is the image produced by a conveging lens like when the object is more than two focal lengths from the centre of the lens? and Draw it

Answer 2

• The image is real
• The image is inverted
• The image is diminished (smaller than the object)
• Examples: the eye and cameras

Question 3

What is the image produced by a conveging lens like when the object is between one and two focal lengths from the centre of the lens?

Answer 3

• The image is real
• The image is inverted (upside down)
• The image is magnified (larger than the object)
• Examples are the projector and the photocopier

Question 4

What is the image produced by a conveging lens like when the object is two focal lengths from the lens

Answer 4

• The image is the same size as the object
• Image is real
• Image is inverted

Question 5

What is the image produced by a conveging lens like when the object is between the principal focus and the centre of the lens?

Answer 5

• The image is erect (the right way up)
• The image is Virtual
• The image is magnified
• The image is also on same side of the lens as the object
• Am example is a magnifying glass

Question 6

Draw the reflection of wavefronts on a plane mirror

Answer 6

Question 7

Draw the diffraction of wavefronts at a glass block

Answer 7

Question 8

Diffraction of wavefronts at a gap

Answer 8

Question 9

Diffraction of wavefronts at an edge

Answer 9

Question 10

Diffraction of wavefronts round an obstacle

Answer 10

Question 11

Draw the dispersion of white light through a prism (red and blue)?

Answer 11

Question 12

How do gas particles exert a high pressure on the walls on the inside of a container?

Answer 12

• molecules hit walls
• Particles rebound and change momentum
• Exerts force on wall and there are many collisions across area of wall

Question 13

What is the difference between evaporation and boiling?

Answer 13

• evaporation only occurs from the surface of the liquid. Boiling happens throughout the liquid
• Evaporations does not produce bubbles whereas boiling does
• Evaporation results in cooling whereas Boiling does not