nda physics quiz optics

Nda physics quiz optics

Choose the appropriate option.

Question 1.

A (A)

B (B)

C (C)

D (D)

Choose the appropriate option.

Question 2. Two thin convex lenses of focal lengths 4cm and 8cm are separated by a distance of 4cm in air, the combination will have the focal length

4cm (4cm)

8cm (8cm)

12cm (12cm)

32cm (32cm)

Choose the appropriate option.

Question 3.

A (A)

B (B)

C (C)

D (D)

Choose the appropriate option.

Question 4. A refracting telescope consists of

one concave mirror and one convex lens (NA)

two convex lenses of equal focal length (NA)

two concave mirrors of different focal lengths (NA)

two convex lenses of unequal focal lengths (NA)

Choose the appropriate option.

Question 5. The mirror used for the head light of a car is

spherical concave (NA)

plane (plane)

cylindrical (NA)

parabolic concave (parabolic concave)

Choose the appropriate option.

Question 6. Yellow color light is used as fog light because yellow color

light is most scattered by fog (NA)

has the longest wavelength among all color (NA)

has the longest wavelength among all colors except red and orange but the red color is already used for brake light and stop light, whereas orange color is avoided due to its similarity with red (NA)

has the shortest wavelength among all color not already reserved for other purpose (NA)

Choose the appropriate option.

Question 7. The human eye is like a camera and hence it contains a system of lens. The eye lens forms

a straight or upright real image of the object on the retina (NA)

an inverted virtual image of the object on the retina (NA)

an inverted real image of the object on the retina (NA)

a straight or upright real image of the object on the iris (NA)

Choose the appropriate option.

Question 8. An object is placed at the focus of a concave mirror. The image will be

real inverted same size at the focus (NA)

real upright same size at the focus (NA)

virtual inverted highly enlarged at infinity (NA)

real inverted highly enlarged at infinity (NA)

Choose the appropriate option.

Question 9. The spread in colors in a rainbow on sky is primarily due to

dispersion of sunlight (NA)

reflection of sunlight (NA)

refraction of sunlight (refraction of sunlight )

total internal reflection of sunlight (NA)

Choose the appropriate option.

Question 10. A beautiful rainbow on the sky is due to the

dispersion of sunlight from a water droplet only (NA)

reflection of sunlight from a water droplet only (NA)

reflection and refraction of sunlight from water droplet only (NA)

refraction dispersion and reflection of sunlight from a water droplet only (NA)