grade 1à

Multiple Choice

Light is a kind of.....

• reflection
• energy
• heat
• matter

Multiple Choice

Which section of the spectrum is the ONLY one we can see?

• Ultraviolet Rays

• Gamma Rays

• X-Rays

• Visible Light

Multiple Choice

The shortest wavelength in visible light is______.

• violet
• red
• blue
• yellow

Multiple Choice

_______ carry the greatest amount of energy. 

• x-rays
• gamma rays
• infrared rays
• visible light

Multiple Choice

What are luminous objects?

• Objects that absorb all light.
• Luminous objects are objects that emit their own light.
• Objects that are only visible in darkness.
• Objects that reflect light from other sources.

Multiple Choice

These waves travel in a __________ line.

• jagged
• squiggly
• straight
• obstructive 

Multiple Choice

The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is .........

• reflected

• refracted

• stopped

• absorbed

Multiple Choice

What is the angle of reflection equal to?

• The angle of refraction

• The angle of absorption

• The angle of incidence

• The angle of light

Multiple Choice

In the diagram, which letter represents the angle of incidence?

• A

• B

• C

• D

Multiple Choice

According to the Law of reflection, a light ray striking a mirror

• continues moving through the mirror in the same direction

• moves into the mirror at a slightly different angle

• bounces off the mirror toward the direction it came from

• bounces off the mirror at the same angle it hits.

Multiple Choice

If the angle of incidence is 20 degrees, what will be the value of the angle of reflection?

• 0

• 10

• 20

• 30

Multiple Choice

The size of an object and its image are the same in this type of mirror...

• Plane

• Convex

• Concave

Multiple Choice

True or False: This diagram shows the correct position of the mirrors so that the light hits the target

• True

• False

Multiple Select

A person views his image in front of a mirror. His image is virtual, upright, and smaller than him. What kind of mirror is he using?

• plane

• concave

• convex

​the central point of the circle that best approximates a curve at a given point

Focal point is the specific point where parallel light rays either converge or appear to diverge from after passing through the lens or reflecting off the mirror

Multiple Choice

The point where the rays meet is known as....

• Fire
• the focal point
• refraction
• Plane of the lens

​Ray Diagrams - Convex Mirrors

​Step 1: From the top of the object, draw two rays
one aimed toward the focal point (but stop at the mirror)
and one parallel to the principal axis.

​Ray Diagrams - Convex Mirrors

​Step 2: Reflect the rays
the focal-point ray reflects parallel
and the parallel ray reflects as if coming from the focal point.

​Ray Diagrams - Convex Mirrors

​Step 3: Extend the reflected rays backward with dashed lines until they meet.
This intersection is the image of the top of the object.

​Ray Diagrams - Convex Mirrors

​Step 4: Repeat the process for the bottom of the object (on the principal axis). Connect top and bottom image points to complete the image.

​Case 1: beyond the center of curvature (C)
Case 2: at the center of curvature (C)
Case 3: between the center of curvature (C) and the focal point (F)
Case 4: at the focal point (F)
Case 5: in front of the focal point (F)

​​Ray Diagrams - Convex Mirrors

Case 1: beyond the center of curvature (C)

Case 2: at the center of curvature (C)

Case 3: between the center of curvature (C) and the focal point (F)

Case 4: at the focal point (F)

Case 5: in front of the focal point (F)

Multiple Choice

This ray diagram is for which mirror?

• concave

• convex

• plane

• window

Multiple Choice

Which terms describe the reflection seen in this image?

• virtual, upright
• virtual, inverted
• real, upright
• real, inverted