Optics Intro
What is the main difference between mirrors and lenses?
Mirrors reflect light, lenses refract light
How do microscopes solve the problem of flipped image?
Using three lenses
How can we have d i (distance of image) negative?
If the image is virtual
Materials that let the passing light through
Transparent materials
Apakah jenis lensa yang digunakan dalam kaca pembesar dalam bahasa Indonesia?
Lensa cembung
Jika benda terletak di Ruang II di hadapan lensa cembung, di manakah lokasi bayangannya?
Ruang III (beyond 2F for the image)
Lens, focal points, principal axis, optical center, object, light lines, image (if any)
How does a mirrorless camera work?
No reflection
Jika benda terletak di Ruang I di hadapan lensa cembung, apa saja ciri khas bayangannya?
Virtual (no image)
What is the main difference between real and virtual image?
Real image is produced by real light particles bouncing or bending on the side of optics, virtual is not really there
What are the main differences between refractive and reflective telescopes?
Refractive telescope uses lenses and observer directly view the image, reflective one uses mirrors and observer sees the reflection
Jika benda terletak di titik 2F di hadapan lensa cembung, apa saja ciri khas bayangannya?
Light travels from air into an optical fiber with an index of refraction of 1.44. If the angle of incidence on the end of the fiber is 22 degrees, what is the angle of refraction inside the fiber?
(1.00) sin 22 degrees = 1.44 sin θ2.
sin θ2 = (1.00/1.44) sin 22 degrees = 0.260
θ2 = sin-1 (0.260) = 15 degrees.
If the scale bar measures 90 mm and the actual size it represents is 30 μm , what is the magnification?
I = A x M (Measured size of image) = Actual size of image x Magnification
M = I / A = 90 mm / 30 μm = 3,000 x
A tree 20 m high is located 40 m from the converging lens of focal length 0.08 m. Calculate the distance from the lens to the image.
0.08 m