Ray Optics and Optical Instruments Quiz

What is the wavelength range of light as defined in the text?

• 200 nm to 400 nm

• 750 nm to 1000 nm

• 400 nm to 750 nm

• 100 nm to 400 nm

According to the Cartesian sign convention, which of the following distances is considered positive?

• Distance measured from the optical center of the lens

• Distance measured downwards from the x-axis

• Distance measured in the same direction as the incident light

• Distance measured opposite to the direction of incident light

What is the relationship between the focal length (f) and the radius of curvature (R) of a concave mirror?

• f = R/3

• f = R/2

• f = R

• f = 2R

In the context of image formation by a concave mirror, what does a negative image distance (v) indicate?

• The image is virtual and erect

• The image is real and inverted

• The image is enlarged

• The image is diminished

What is the formula for the mirror equation derived in the text?

• 1/v + 1/u = 1/f

• 1/v - 1/u = 1/f

• 1/v + 1/u = -1/f

• 1/v - 1/u = -1/f

What happens to the image when the lower half of a concave mirror is covered with an opaque material?

• The image will be that of the whole object but with lower intensity

• The image will become larger

• The image will disappear completely

• The image will show only half of the object

What is the critical angle for total internal reflection?

• The angle at which light is partially reflected

• The angle at which light travels straight through the medium

• The angle at which light is completely refracted

• The angle of incidence for which the angle of refraction is 90°

How does the refractive index of a medium relate to the speed of light in that medium?

• Higher refractive index means slower light speed

• Lower refractive index means slower light speed

• Refractive index has no effect on light speed

• Higher refractive index means faster light speed

What is the power of a lens with a focal length of 0.5 m?

• 0.5 D

• 1 D

• 2 D

• 4 D

In a compound microscope, what type of image does the objective lens produce?

• Virtual and erect

• Virtual and inverted

• Real and inverted

• Real and erect