Welcome to your Ray optics and optical instrume
1.
Object at 30 cm from lens (f = 20 cm), concave mirror makes upright image. Mirror radius?
2.
Convex + concave lenses, f = 25 cm. Power?
3.
A person is 6 ft tall. Min. mirror length to see entire self?
4.
Convex lens in liquid (μ = lens). Focal length?
5.
Light (ν, λ) enters glass (μ). New values?
6.
Light frequency = 100 Hz. Wavelength?
7.
Two plane mirrors are inclined at 70°. Incident ray reflects and becomes parallel to first mirror. Find angle of incidence θ.
8.
Light enters glass at angle i. No lateral shift if
9.
Match magnification to mirror: m = -2, m = -1/2
10.
Two thin lenses F, filled with glycerin (μ = 1.5), net focal length F₂?
11.
Equiconvex lens, cut along principal axis → power of one part?
12.
Biconvex in liquid (μ = glass) acts as?
13.
Equiconvex, f = 10 cm. Sun rays focus on paper. D = 1.39×10⁹ m, r = 1.5×10¹¹ m. Image size?
14.
Two mirrors at 60°, object placed between. Number of images?
15.
Not due to total internal reflection?
16.
Plano-convex fits into plano-concave (μ₁, μ₂). Focal length?
17.
Point source at 4 m below water (μ = 5/3). Minimum disc diameter to block light?
18.
Light through glass t, μ. Time?
19.
Two lenses f₁ and f₂, coaxial. Power?
20.
In total internal reflection, angle of refraction at critical angle is
21.
Biconvex lens: R = 20 cm, object 2 cm at 30 cm. Image?
22.
Wavelength in glass (μ = 1.5) if incident λ = 6×10⁻⁷ m?
23.
A 10 cm rod lies along the principal axis of a concave mirror. Closer end is 20 cm away; focal length is 10 cm. Find length of image.
24.
Convex lens (f₁), concave mirror (f₂), image at ∞. Find d.
25.
Equiconvex cut in two ways: XOX′ and YOY′. f′, f″?
26.
Ray optics valid when dimensions are
27.
Double convex lens: focal 25 cm, R₂ = 2×R₁, μ = 1.5. Find R₁
28.
Air bubble in glass (μ = 1.5), appears 2 cm deep. Actual depth?
29.
Light has f = 2×10¹⁴ Hz and λ = 5000 Å. μ = ?
30.
Reddish sunset is due to
31.
Plano-convex: R = 60 cm, μ = 1.6. Focal length?
32.
A beam is reflected normally from a mirror. The mirror rotates by angle θ, and the reflected spot moves by distance y. Angle θ is given by
33.
Converging lens: f measured for violet, green, red. Correct relation?
34.
Glass plate 6 cm thick. Object 8 cm in front, image 12 cm behind. Find μ.
35.
Converging beam to diverging lens. Rays focus 5 cm past lens. Object rays meet at 15 cm before. Focal length?
36.
Light travels from bottom of beaker (μ = 1.33). Speed in liquid?
37.
Lens with focal f and aperture d. Image intensity ∝ ?
38.
Light hits glass at 45°, which μ for total internal reflection?
39.
Plano-convex, R = 10 cm, μ = 1.5. Plane surface silvered. Find focal length.
40.
For TIR in rectangular slab with angle 45°, find μ
41.
Two identical plano-convex lenses (μ = 1.5, R = 20 cm), liquid in between (μ = 1.7). Net focal length?
42.
Time sunlight takes to pass window glass of 4 mm (μ = 3/2)?
43.
Image of equal size at distance d using convex lens. f = ?
44.
Red & green rays fall on glass; exit face?
45.
λ = 5460 Å in air. Glass (μ = 1.5). λ in glass?
