April 18, 2024
Consider the following statements:
1. The Sky appears blue because of scattering.
2. The main cause of seven colors of the rainbow is scattering of light.
3. At the time of sunrise, the sun appears red, due to scattering of light.
Choose the correct statement/s from the given options:
  • (A) Only 1 is true
  • (B) 1 and 3 is true
  • (C) Only 2 is true
  • (D) 2 and 3 is true 
What will be the nature of image formed by a convex mirror when the position of object is between infinity and pole P of the mirror?
  • (A) Virtual and erect
  • (B) Real and inverted
  • (C) Real and erect
  • (D) Virtual and inverted
The visible range of solar radiation is-
  • (A) 100-400 nm
  • (B) 400-700 nm
  • (C) 740-10000 m
  • (D) None of the above
The mirror, which is used in searchlights, is –
  • (A) Concave mirror
  • (B) Convex mirror
  • (C) Simple mirror
  • (D) None of these
Consider the following statements :
1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?
  • (A) 1 and 2
  • (B) 1 alone
  • (C) 2 alone
  • (D) Neither 1 nor 2
Which one of the following statement is not correct?
  • (A) Mirage is an optical illusion arising due to total internal reflection of light
  • (B) Concave mirrors are used in searchlights
  • (C) In summer, white or light coloured clothes are preferred to dark coloured clothes generally
  • (D) Convex mirror with a small aperture is used by doctors to examine, ear, nose or throat of a patient.
If the lens power of glass is +2 diopter, its focal length will be
  • (A) 200 cm
  • (B) 50 cm
  • (C) 100 cm
  • (D) 2 cm
The sun is visible to us a few minutes before the actual sunrise because of :
  • (A) Scattering of light
  • (B) Diffraction of light
  • (C) Total internal reflection of light
  • (D) Refraction of light
Rainbow is produced when sunlight falls on drops of rain. which of the following physical phenomena are responsible for this?
1. Dispersion
2. Refraction
3. Internal reflection
Select the correct answer using the code given below :
  • (A) 1 and 2
  • (B) 2 and 3
  • (C) 1 and 3
  • (D) All of these
An air bubble in water will act like a:
  • (A) Convex mirror
  • (B) Convex lens
  • (C) Concave mirror
  • (D) Concave lens
For the conservation of migratory species of wild animals which convention took place?
  • (A) Rio de Janeiro Convention
  • (B) Bonn Convention
  • (C) Basel Convention
  • (D) Aarhus Convention
CITES is an international treaty on
  • (A) Air pollution
  • (B) Water pollution
  • (C) Conservation of endangered plants and animals
  • (D) All the above
Kyoto protocol is related with ______
  • (A) Population
  • (B) Resources
  • (C) Global Warming
  • (D) Pollution
Ramsar Convention" is related to
  • (A) Climate change
  • (B) Pesticide pollution
  • (C) Ozone layer depletion
  • (D) Wetland conservation
________, the world’s first sailing boat made entirely from plastic waste, aims to raise people’s awareness of plastic pollution in oceans.
  • (A) Triptropi
  • (B) Blipblopi
  • (C) Snipsnopi
  • (D) Flipflop

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