Prisms, Fresnel's Biprism   (LT-2030)

Optically worked made from crown glass
(a) 40x30 mm (b) 50 x 40mm

Blocks, Glass   (LT-2031)

Rectangular, all sides polished, made from slightly greenish glass free from bubbles
Dimensions
(a) 75 x 50 x 12 mm
(b) 75 x 50 x 18 mm
(c) 100 x 60 x 18 mm
(d) 115 x 65 x 18 mm
(e) 125 x 65 x 18 mm

Blocks, Glass   (LT-2032)

Made from moulded glass, polished surfaces
(a) 75 x 50 x 18 mm (b) 100 x 60 x 25 mm

Blocks, Perspex, Rectangular   (LT-2033)

Clear acrylic, all faces fully polished
(a) 75 x 50 x 18 mm
(b) 100 x 65 x 18 mm
(c) 115x65x20 mm
(d) 100 x 45 x 25 mm

Blocks, Semi Circular   (LT-2034)

All faces nicely polished.
Dia x Thickness

(a) 90 mm x 12 mm (Glass)

(b) 90 mm x 18 mm (Glass)

(c) 90 mm x 12 mm (Perspex)

(d) 90 mm x 18 mm (Perspex)

Acrylic Plastic Blocks, Set   (LT-2035)

Clear acrylic plastic blocks 18 mm thick with bottom surface
finished in white, to show ray tracks and all other surfaces
fully polished.

The set corn prises
a) Rectangle 75 x 50 mm
b) Triangle 90° x 45° x 45° , 75 mm hyp.
c) Triangle 60° x 60° x 60° , 57 mm side
d) Semi-circular 75 mm diameter
e) Bi-convex 75 mm long, curved faces, 115 mm radius
f) Bi-convex 75 mm long, curved faces, 145 mm radius
g) Bi-concave 75 mm long, curved faces, 115 mm radius
h) Bi-concave 75 mm long, round 145mm radius
i) Triangle 60° , 30° , 90°
j) Trapezoidal 60° and 45° prism ends.
All packed in storage box.

(Note: Other size and thickness can also be supplied on
demand)

Optical Pins   (LT-2036)

Nickel plated, brass heavy gauge, packs of 100gms.
(a) L=50mm; (b) L=75mm

Optical Pins   (LT-2037)

Made of iron
(a) L = 50mm; (b)75mm

Critical Angle Apparatus   (LT-2038)

To determine refractive index of a liquid by measuring the critical angle. It comprises a bridge 150 x 100 x 75 mm, air cell 40 x 30 mm held by detachable spring clips, (air cell consists of two glass plates held parallel at small distance apart in a frame). Air cell holder is attached to a knob carrying pointer with scale graduated 0-360°. Supplied without tank.

(LT-2038/1)
Accessories
Tank
Transparent perspex tank 70 x 70 x 70 mm (approx) to hold liquid under investigation

Hand Magnifier   (LT-2039)

Bi-convex lens fitted in nickel plated metal frame with
metallic handle.

Magnifier   (LT-2040)

Same as but with bakelite handle.

Magnifier, Reading Glass   (LT-2041)

Fitted in unbreakable plastic mount with handle
(a) Dia 40 mm
(b) Dia 50 mm
c)Dia 60 mm
(d) Dia 75 mm

Magnifier, Reading Glass   (LT-2042)

Superior

Magnifier Folding   (LT-2043-a)

Fitted in plastic frame, 20mm dia lens approx
(a) Single 4 x

Magnifier Folding   (LT-2043-b)

Fitted in plastic frame, 20mm dia lens approx
(b) double 7 x