iGCSE Physics Light

An eye views an object O by reflection in a plane mirror. Which is the correct ray diagram? 

• A
• B
• C
• D

The diagram shows a ray of light from one point on a lamp striking a plane mirror. The image of the point on the lamp formed by the mirror is 

• at P and is real.
• at P and is virtual.
• at R and is real.
• at R and is virtual. 

If a capital letter R is seen in an ordinary mirror, what does it look like?

• A

• B

• C

• D

Section B1a
Given that the angle of incidence = 30 degrees
a. Draw a ray diagram, labelling clearly the normal, incident ray, angle of incidence, reflected ray and angle of reflection accurately.
Which is the correct diagam? 

• A
• B
• C
• D

If v is the speed of light in a medium and c is the speed of light in vacuum, the formula to calculate the refractive index (n) of a medium is

• n=cv

• n=v/c

• n=c/v

• v=nc

A man sees a stone at the bottom of a pool of water. Which path could be taken by light from the stone to the man? 

• A
• B
• C
• D

A microwave has a frequency of 300MHz. What is the wavelength of these waves?

• 1000 m

• 100 m

• 10 m

• 1 m

Topic: Wave Properties

• A

• B

• C

• D

Topic: Wave Properties

• A

• B

• C

• D

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• A

• B

• C

• D