Optical Instruments MCQs

Option A: spectrometer

Option B: galvanometer

Option C: interferometer

Option D: none of these

Correct Answer: spectrometer ✔

Option A: Newton

Option B: Einstein

Option C: Raleigh

Option D: Planks

Correct Answer: Raleigh ✔

Option A: object is beyond C

Option B: if the object is with in C

Option C: if the object is within f

Option D: both B and C

Correct Answer: both B and C ✔

Option A: C = 4fd

Option B: C = 8fd

Option C: C = 16fd

Option D: C = 5/2fd

Correct Answer: C = 16fd ✔

Option A: 300km

Option B: 200km

Option C: 100km

Option D: 20km

Correct Answer: 100km ✔

Option A: to produce parallel beams of light

Option B: to filter the light rays

Option C: to make them

Option D: no function

Correct Answer: to produce parallel beams of light ✔

Option A: Multimode index fiber

Option B: Graded index fiber

Option C: Single mode step index fiber

Option D: Copper wire

Correct Answer: Graded index fiber ✔

Option A: fo+fe

Option B: fo/fe

Option C: fe/fo

Option D: (1+fo/fe)L/fo

Correct Answer: fo/fe ✔

Option A: Diodes

Option B: Repeaters

Option C: Laser

Option D: Transformer

Correct Answer: Repeaters ✔

Option A: 42°

Option B: 47°

Option C: 52°

Option D: 50°

Correct Answer: 42° ✔

Option A: center of curvature

Option B: focus

Option C: optical center

Option D: aperture

Correct Answer: focus ✔

Option A: 10 dioptre

Option B: 10 dioptre

Option C: 1 / 10 dioptre

Option D: 1 / 10 dioptre

Correct Answer: 10 dioptre ✔

Option A: 2 f

Option B: 2.5 f

Option C: 3f

Option D: 4f

Correct Answer: 4f ✔

Option A: between principal focus and center of curvature

Option B: beyond 2 f

Option C: at the principal focus

Option D: between principal focus and optical center

Correct Answer: between principal focus and optical center ✔

Option A: 0.5

Option B: 0.2

Option C: 1

Option D: 2

Correct Answer: 2 ✔

Option A: increases with increase in age

Option B: decreases with increase in age

Option C: neither increases nor decreases

Option D: becomes infinite after 60 years

Correct Answer: increases with increase in age ✔

Option A: zero

Option B: focus

Option C: 2 f

Option D: f/2

Correct Answer: f/2 ✔

Option A: fo + fe

Option B: fo – fe

Option C: fo / fe

Option D: fe / fo

Correct Answer: fo + fe ✔

Option A: real and inverted

Option B: real and erect

Option C: virtual and erect

Option D: virtual and inverted

Correct Answer: virtual and inverted ✔

Option A: same

Option B: different

Option C: zero

Option D: different with refractive index of core higher than cladding

Correct Answer: different ✔

Option A: f2 + f1

Option B: f2 – f1

Option C: f1f2/f2+f1

Option D: f1f2/f1-f2

Correct Answer: f1f2/f1-f2 ✔

Option A: chromatic aberration

Option B: spherical aberration

Option C: both spherical and chromatic

Option D: distortion

Correct Answer: spherical aberration ✔

Option A: 15 cm

Option B: 25 cm

Option C: 30 cm

Option D: 40 cm

Correct Answer: 25 cm ✔

Option A: increase with increase in focal length

Option B: increase with decrease in focal length

Option C: no effect with decrease or increase with focal length

Option D: list distance of distinct vision

Correct Answer: increase with decrease in focal length ✔

Option A: real and erect

Option B: virtual and erect

Option C: real and inverted

Option D: virtual

Correct Answer: real and inverted ✔

Option A: real

Option B: virtual

Option C: positive

Option D: negative

Correct Answer: negative ✔

Option A: meter

Option B: watt

Option C: diopter

Option D: horsepower

Correct Answer: diopter ✔

Option A: focal length

Option B: principal axis

Option C: aperture

Option D: radius of curvature

Correct Answer: principal axis ✔

Option A: diverging (or concave) lens

Option B: converging (or convex) lens

Option C: plano concave lens

Option D: plano convex lens

Correct Answer: converging (or convex) lens ✔