The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as

The point on the photograph where bisector between the vertical line through optical centre of the camera lens and the plate perpendicular meets, is known as

A

Principal point

B

Isocenter

C

Plumb point

D

Perspective centre

Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

A

-4.33 diopters

B

12.33 diopters

C

-12.33 diopters

D

4.33 diopters

The point where a vertical line through the optical centre of the camera lens intersects the ground, is known as

A

Ground principal point

B

Ground plumb point

C

Iso-centre

D

Perspective centre

Forty tiles of dimensions 1 foot * 2 foot each are required to completely cover a floor. How many tiles of dimensions 2 foot * 4 foot each would be required to completely cover the same floor?

A

10

B

20

C

80

D

160

স্লাইডে ছবি যুক্ত করার জন্য-i. Insert মেনুর রিবনে picture আইকন click করতে হবেii. Insert picture বক্স থেকে ছবি সংযোগ করতে হবেii. Picture রেডিও বোতাম সক্রিয় করতে হবেনিচের কোনটি সঠিক?

A

i ও ii

B

i ও iii

C

ii ও iii

D

i, ii ও iii

If ‘f’ is the focal length of the camera lens and ‘θ’ is the angle of tilt, the distance of the plumb point from the principal point will be

A

f sin θ

B

f cos θ

C

f tan θ

D

f sec θ

Plane P take off at 2:00 am and flies at a constants speed of Xmph. Plane Q takes off at 3:30 am and flies the same forte as plane p but travels at a constant X, how many hours after 3:30 am will plane Q overtake plan P?

A

1.5x/y +0.5

B

2

C

4

D

5

The moment of inertia of a circular lamina of diameter ‘d’, about an axis perpendicular to the plane of the lamina and passing through its centre, is

A

$$\frac{{\pi {{\text{d}}^4}}}{{12}}$$

B

$$\frac{{\pi {{\text{d}}^4}}}{{16}}$$

C

$$\frac{{\pi {{\text{d}}^4}}}{{24}}$$

D

$$\frac{{\pi {{\text{d}}^4}}}{{32}}$$

E

$$\frac{{\pi {{\text{d}}^4}}}{{36}}$$

I put the camera _______ a tripod so I can take a steady picture.(Select the correct word)

A

By

B

above

C

in

D

on

Fill in the gaps : I put the camera ----- a tripod so I can take a steady picture.

A

by

B

above

C

in

D

on

The foot of the perpendicular on the picture plane through the optical centre of the camera lens, is known as

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