Refraction and Reflection IGCSE Physics

A ray of light is reflected by two parallel plane mirrors X and Y.  Which statement is correct? 

• The angle of incidence at mirror X is 30°.
• The angle of incidence at mirror Y is 60°.
• The angle of reflection at mirror X is 120°.
• The angle of reflection at mirror Y is 0°. 

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

• A
• B
• C
• D

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NGSS.MS-PS4-2

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. 

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NGSS.MS-PS4-2

Light is an example of a transverse wave

• True

• False

The critical angle in the diagram is 43 degrees. What is the angle of refraction at the critical angle?

• Less than 43

• Equal to 43

• More than 43 but less than 90

• Equal to 90 degrees

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NGSS.MS-PS4-2

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

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NGSS.MS-PS4-2

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

• A

• B

• C

• D

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NGSS.MS-PS4-2

This reflection is

• specular.

• diffuse.

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NGSS.MS-PS4-2

Images in a plane mirror are

• real

• larger

• same size

• smaller

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NGSS.MS-PS4-2

When light passes from air to water, what happens to the speed of the light?

• speeds up

• slows down

• stays the same

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NGSS.MS-PS4-2