Straight Mirrors

Straight Mirrors

Curved Mirrors

Ray Diagrams

Definitions and

Formulas

Formulas

Units

100

Size of image compared to object size.

What is 1:1 or same size?

100

An object is 10 cm from a curved mirror has an image this far from the curved mirror.

What is CANNOT tell without knowing if the mirror is concave (6 cases depending on the focal length) or convex mirror (but again would need to know the focal length)?

100

Where is the Image of case 1 where the light from the object is coming in parallel to the concave mirror...

What is the image is at the focal point?

100

The rate at which visible light falls on a surface measured in lumens per square meter OR Luxs.

What is illumination?

100

Unit for focal length, distance of object, distance of image, height of object, or height of image.

What is the meter?

200

Size of drawing on mirror compared to object size.

What is 1:2 or size of drawing half the size of the object?

200

An object is 10 cm from a concave mirror whose focal length is 5cm has an image at distance

What is 10 cm (as this is case 3 with the object at C so the image is at C also)?

200

Concave mirror case 3 has what four image descriptions where the object is at the center of curvature of the mirror.

What is real, same size, inverted, and at C?

200

The measure of the flow of visible light from a source measured in lumens.

What is luminous flux (P)?

200

The unit for illuminance of light with variable E.

What is Lux or lx?

300

Size of drawing on mirror compared to image size.

What is 1:2 or size of drawing half the size of the image (which is the same size as the object)?

300

A type of mirror with only has one case.

What is CONVEX MIRROR?

300

Name any two of the four possible rays that can be drawn from an object point to locate the image point of a curved mirror.

What is 1) ray through C (center of curvature) reflects straight back through object point.
2) a parallel ray to the principal axis through the object point reflects through the focal point.
3). a ray through the focal point and the object point reflects parallel to the principal axis
4). a ray through the object point to the point that hits the principal axis at the mirror reflects so angle i equals angle r

300

The type of light bulb that has Mercury in it. ( Hazardous to life! )

What is florescent light bulbs?

300

Unit for luminous flux which is the flow of visible light from the light source.

What is lumens (lm)?

400

Distance of image in a plane mirror compared to distance of object (BOTH MEASURED PERPENDICULAR TO THE MIRROR).

What is the two distances are the same? distance of object from mirror equals distance of image from mirror

400

In the ripple tank lab with the concave mirror, the focal point for straight waves was obvious as it shadow showed up easily. After marking the focal point, the center of curvature of the mirror could be located how...

What is you could either just double the focal length on the principal axis OR you could draw two tangents to the curve of the mirror on either side of the principal axis the construct perpendiculars to the points of tangentcy and they would meet at C.

400

Name the image descriptions for case 5 of concave mirrors where the object is at the focal point

What is NO IMAGE? (because the reflected rays are parallel to each other so never meet even if traced behind the curved mirror)

400

Instead of using the mirror equation to find the focal point of curved mirror knowing the distances of the object and image, one can use the MAD formula (derived from solving the mirror equation for f). MAD is an acronym for

What is (Multiple the distances, then Add the distances, finally Divide by that sum) so Multiple Add Divide?

400

What is the unit for luminous intensity (I) which is the average amount of visible light from the standard candle.

What is a candela (cd) or candle?

500

If the orientation of triangle ABC of the object is counterclockwise, then the orientation of the image A'B'C' is ...

What is clockwise? (image in a plane mirror is reversed)

500

Find both the magnification of the the focal point of a concave mirror object if the distance of the object is 10 cm and the distance of the image is 15 cm.

What is the magnification is -1.5 and the focal point is 6 cm?

500

Name the four descriptions of the image for the convex mirror.

What is 1) virtual 2) upright 3) behind the mirror 4) smaller or M<1

500

Name any three of the five advantages of LED (light emitting diode) bulbs over florescent light bulbs:

What is much less costly for electricity, no Mercury poisoning, built more rugged (does not break easily), last over a decade longer bulb life, disposal is easier (can be placed in a landfill), saves us from building more power plants?

500

Place the units for the following variables in order:
I, E, h, P the units used are m,cd,lm,lx

What is cd, lx, m, lm?