optics

Question 1

What is the definition of optics?

Answer 1

Optics is the branch of physics that studies the behavior and properties of light.

Question 2

True or False: Light travels faster in water than in air.

Answer 2

False

Question 3

What is the term for the bending of light as it passes from one medium to another?

Answer 3

Refraction

Question 4

Fill in the blank: The angle of incidence is equal to the angle of _____ in reflection.

Answer 4

Reflection

Question 5

What is the formula for calculating the index of refraction?

Answer 5

n = c/v, where n is the index of refraction, c is the speed of light in vacuum, and v is the speed of light in the medium.

Question 6

What type of lens converges light rays?

Answer 6

Convex lens

Question 7

What type of lens diverges light rays?

Answer 7

Concave lens

Question 8

True or False: A virtual image can be projected onto a screen.

Answer 8

False

Question 9

What is the principal focus of a lens?

Answer 9

The point where parallel rays of light converge or appear to diverge after passing through the lens.

Question 10

What is the relationship between the focal length and the curvature of a lens?

Answer 10

The more curved the lens, the shorter the focal length.

Question 11

What is total internal reflection?

Answer 11

The phenomenon where light is completely reflected within a medium when it hits the boundary at an angle greater than the critical angle.

Question 12

Fill in the blank: The color of light is determined by its _____ frequency.

Answer 12

Wavelength

Question 13

What is the visible spectrum?

Answer 13

The range of wavelengths of light that can be detected by the human eye, approximately 400 to 700 nm.

Question 14

What is dispersion in optics?

Answer 14

The separation of light into its component colors due to different degrees of refraction.

Question 15

True or False: A concave mirror can produce both real and virtual images.

Answer 15

True

Question 16

What is the formula for the lens maker’s equation?

Answer 16

1/f = (n - 1) (1/R1 - 1/R2), where f is the focal length, n is the index of refraction, and R1 and R2 are the radii of curvature.

Question 17

What happens to light rays that are parallel to the principal axis when they pass through a convex lens?

Answer 17

They converge at the focal point.

Question 18

What is a real image?

Answer 18

An image formed when light rays converge and can be projected onto a screen.

Question 19

Fill in the blank: A _____ lens is thicker in the center than at the edges.

Answer 19

Convex

Question 20

What is the critical angle?

Answer 20

The minimum angle of incidence at which total internal reflection occurs.

Question 21

What does the term ‘optical axis’ refer to?

Answer 21

An imaginary line that passes through the center of a lens or mirror and is perpendicular to its surface.

Question 22

True or False: The speed of light is constant in all media.

Answer 22

False

Question 23

What is a plane mirror?

Answer 23

A flat mirror that produces a virtual image that is the same size as the object.

Question 24

What does a spectrometer measure?

Answer 24

The wavelengths and intensity of light.

Question 25

What is the difference between luminous and illuminated objects?

Answer 25

Luminous objects produce their own light, while illuminated objects reflect light from other sources.