WorksheetsLens Equation
Total questions: 15
Worksheet time: 15mins
The ho in this diagram is positive.
True
False
The do will be a _________________ value.
positive
negative
In the mirror equation above d0 represents:
Distance of the object from the mirror
Distance of the image from the mirror
The focal length
The plane of incidence
To focus light onto the photosensitive surface at the back of the camera. This can either be photographic film or a CCD (charge-coupled device)
Lens
Focusing screw
Shutter
Aperture
Which of the following is the correct form of the lens equation?
f1=v1+u1
f=v+u
f=uv
f=vu
If the focal length of a lens is 10 cm and the object distance is 30 cm, what is the image distance?
15 cm
20 cm
30 cm
40 cm
A lens has a focal length of -15 cm. What type of lens is it?
Convex lens
Concave lens
Biconvex lens
Plano-convex lens
Which of the following statements is true about the lens equation?
It is applicable only for convex lenses.
It is applicable only for concave lenses.
It is applicable for both convex and concave lenses.
It is not applicable for any lens.
In an experiment, a lens forms a real image of an object placed 25 cm away. If the image is formed 50 cm on the other side, what is the focal length of the lens?
16.67 cm
20 cm
25 cm
33.33 cm
What happens to the image distance if the object distance is increased while using a convex lens?
Image distance increases
Image distance decreases
Image distance remains the same
Image distance becomes zero
A lens forms a virtual image that is 3 times the size of the object. If the object distance is 10 cm, what is the image distance?
-30 cm
30 cm
-10 cm
10 cm
Which of the following is a real-world application of the lens equation?
Calculating the power of a lens in eyeglasses
Determining the speed of light
Measuring the wavelength of light
Finding the density of a material
If a lens has a power of +2 diopters, what is its focal length?
50 cm
100 cm
150 cm
200 cm
In a lens system, if the object is moved closer to the lens, what happens to the focal length?
Focal length increases
Focal length decreases
Focal length remains the same
Focal length becomes zero
Which of the following experiments can be used to verify the lens equation?
Measuring the image distance for various object distances using a convex lens
Measuring the speed of sound in air
Determining the boiling point of water
Finding the refractive index of a prism
