physics 4th term

Fill the blanks with appropriate words.

1. Objects that emit their own light are called?

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OFF

1. _____________ mirror is a part of a sphere

that curves INWARD.

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If you want to obtain the image of the same

size you need to put an object at __________

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When moon comes between Earth and Sun it is called _____________ eclipse.

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Completely dark part of a shadow is called __________.

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1. An object is 10 cm away from

the concave mirror with a focal

length of 5 cm.

What are the properties of the

image?

• bigger than original

• real

• upright

• inverted

• virtual

In the figure below, which points on the screen are

a. illuminated?

b. in the umbra?

c. in the penumbra?

• A,B,C

• B,C,A

• C,B,A

• C,A,B

A ray of light strikes a plane mirror

at an angle of 40° with the normal.

What is the angle of reflection?

• 40

• 50

• 30

• 70

A ray of light strikes a plane mirror

at an angle of 40° with the normal. What is the angle between the incident and

reflected ray?

• 90

• 80

• 40

• 60