Asked/Added Questions From NCERT:

Question 1. Asked on :26 January 2020:02:05:33 PM

Write the colours of sun ?

-Added by Manisha Kumari Science » Light And Reflection

Answer:

priyanshu kumar
White

-Answered by priyanshu kumar On 17 February 2020:02:55:00 PM

Question 2. Asked on :31 October 2019:07:24:40 PM

Write the causes presbyopia?

-Added by Himanshi Verma Science » Light And Reflection

Answer:

Rohit Rajput

1. Gradual weakening of ciliary muscle.

2. Diminishing flexibility of eye lens.

-Answered by Rohit Rajput On 01 November 2019:09:16:51 AM

Question 3. Asked on :10 September 2019:10:04:17 AM

What is the cause of dispersion of light?

-Added by Himanshi Verma Science » Light And Reflection

Answer:

priyanshu kumar
When white light passes through a glass prism, different constituent colours bends through different angles with respect to the incident ray and hence are seprated.

-Answered by priyanshu kumar On 03 October 2019:01:30:24 PM

Question 4. Asked on :10 September 2019:10:01:49 AM

What is dispersion of white light?

-Added by Himanshi Verma Science » Light And Reflection

Answer:

Akki chauhan
Splitting of white light into seven constituent colours by a prism is called dispersion of white light.

-Answered by Akki chauhan On 11 September 2019:11:37:24 AM

Question 5. Asked on :03 August 2019:08:34:19 PM

Write the lens and mirror formula.

-Added by Master Mind Science » Light And Reflection

Answer:

Himanshi Verma

Lens and mirror formula are defined by the relationship among the distance of object (u), distance of image (v) and the focal length(f).

Lens Formula:

Mirror Formula:

-Answered by Himanshi Verma On 18 August 2019:10:48:22 AM

Question 6. Asked on :03 August 2019:07:33:41 PM

What is lens?

-Added by Master Mind Science » Light And Reflection

Answer:

Himanshi Verma

Lens is a piece of glass or transparent material which is bounded by two or one spherical surfaces.

-Answered by Himanshi Verma On 18 August 2019:10:48:42 AM

Question 7. Asked on :28 December 2018:10:59:05 PM

What are the various uses of concave mirror?

-Added by ATP Admin Science » Light and Reflection

Answer:

Nishant Verma

Use of cancave mirror;

(i) Concave mirrors are commonly used in torches, search-lights and vehicles headlights to get powerful parallel beams of light.

(ii) They are often used as shaving mirrors to see a larger image of the face.

(iii) Concave mirrors are used to see large images of the teeth of patients by the dentists.

(iv) Large concave mirrors are used to concentrate sunlight to produce heat in solar furn

-Answered by Nishant Verma On 06 October 2019:09:46:42 AM

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